5
DEPARTMENT . OF NATURAL RESOURCES DIVISION OF MINES ANO GEOLOGY T 22 N \ I T 23 N / I Qt 0 / \ T 25 N T 24 N I T 26 N I ""c:I C (j) rn .... \ "' R 3 E T ' 21 N ,1)1\S ) v Qt S7 Qp .-1,'::i 0o -D - t) Qt Green lake ! , _g;. SEAT TL g I R 4 E ) -~ Lake " I Washington \ o, I Oo J Qo KENT fZl Qa 0 Qo J ' a 7 y ,, GEOLOGIC MAP OF KING COUNTY 0 1 WASHINGTON COMPILED BY VAUGHN E. LIVINGSTON 1970 i 2 3 4 5 6 JR. 12 MILES R 5 E " "' Pant I, '\'Lake ""- ,. \ ' 8 Qt Qt eadow Lake· Qt Desire, r ~Sprin Lok~ ,.,;,; - La ,, -l w \)( Qp , .... I Lake ' Youngs u R 6 E o, PinV. ,, C-. "''v< . "' MAPLE Qt ri an 122°00' R 7 E ~. " DUVALL, _ _.--- Qo Qt Ot Ames la ·~- I Qt ' S<i Qp ~ 11 n Qo 8 I I ! -~ --~ - Qo I Qt Oo .,.---.._i Oo > ,_.r i _ LA_!,IDSBURG ____ IT _J N H MISH CO. Qt ciu ~&-£,='- - - - <:i I ;;;:, o. +; ,, fZJ SEllECK wd .. ~N Lake Retreat Tv Tv o, R 8 E ~ 0- " MTs o, r8 \,.) Klaus Lake Tv " R 9 E R 10 E R 11 E Tv 8 _.-?,-.. , -"'"'/- --- ~ / ?:==~;"' \, / __ ____., t I o, : ~-~ · _J I I T1 1t T Reservoir ____., J ,.-- 1 I / Tv I I Ts I Calligan ~·) , 1 -...,_ /r-- Lake -, ~,~ °f l I MTs MTs Tg Tg ~- "' ,, ,. ,. "'' Lake 1.... hilippa MTs / e e3-- MTs 0, 121°30' - , ',rr:-i:=r---"'-. .' ... ,, Tg T 24 { N Dream Loke C:, ,, Francis v take R 11 E Tg Tg (91---- _ <>, / Hester LakeC --- Tv Chester Morse ake Thompson LakV '• Cedor Findley lake D :'.J Oerrick Lake e dl"" lak '0 Pratt Lake - 0 . ..,, Kullakulla La 0 Mason Lake p lsland La Tg Lower Juscohatchie \) Lake e fuscohatchie lake ' { ,, ,, T 22 N T ) 21 - ' if BULLETIN 63 PLATE 1 ----, R 12 E R 13 E Tv •• Tv I T 23 N MAP SYMBOLS Contact '• ' I I ,,, Known , oppro~imote ond inferred or undifferen t iated. Scratch boundary Con toe! uncertain or edge of mopped oreo, ------ Fault Cf,arncte, not de,;gnoted; dc, hed where opp<oxirmte. Thrust fault Serration, on upper plote. ,. •• I \ Ts I I I I I I I I I I I r I I SCENIC Surpris'1 Lake J Glacier "1 lake - } T 25 N STEVENS PASS T 26 N r V Fisher lake \p;, """ Ptarmiga n'.J lake _ \ C?,. lake ClariCeO "• u 0 N 0 z w u _,, Ts / .... z w u w "' T 24 N Lake "--- ,, EXPLANATION GJ Alluvium Mostly unconsolidated ,ilt, SC1nd, ond grovel volley fill with ,ome cloy. Include, orlifi- ciol fill ond peat locally. Vashon ti II Hord, blue-gray to groy concrete-like mixt'-"e of cloy, ,ilt, sond, and grovel. Pre-Vashon deposits undifferentiated Till, oulwash, ond os,;ocioted interglacial depo,its; sorted ond unsorted grovel,,ond, silt, ond cloy. GJ Landslide deposits Deformed deposits ond debris of moss flowoge ond block ,Ude,. Vashon outwash Advance ond recessional outwc,h, ,tratified dcift ond os,;ocioted deposits. Made up pdmorily of slit, SC1nd, ond grove/ with some cloy. Miocene continental sed imentary rocks Clayey sands ond q._.,rtzose sands with some conglomerate in the Green River oreo, Include, volcanic o,h beds ond woody lignite. In the southeastern pc,rt of the county the deposit, ore conglomerate SC1ndstone with on os,ociated andesite Flow . 8 G Oceola Mudflow Unsorted till-like mixture of gronule - to - cobble - slzed rock fu:igments in cloy, silt, ond SC1nd motrlx. Glacial and alluvium deposits undifferentiated U,,con,ol;datedolluvial silt, :sond, and gravel; ,mitifled outwash grovel, .ond, si It, ond day; Iii I compased of unsorted cloy, sand, cobble,, ond boulders. G Peat Chiefly decomposed vegetc,I molter. Some bog, contatn thin cloy, diotomite, ond pumice beds. Snoqualmie Granodiorite D Principal rock type is gr<modiorite but locally includes granite and quortz diorite. Tertiary volcanic rocks Oligocene sedimentary rocks Well cemented dark gray marine ,iltst0t1e and light gray mudstooe with some groy- wccke "'ndstone and ,:onglomerote beds. Mo,tly ondesite brecclo, and onde,ite flows. Basalt, rhyolite, ond luff, cl,o pre.,.,nt. Tertiary intrusives Include, dikes, plugs, ,tocks, and sill, of rhyolite, /omprophyre, ondestte, onde,i!e porphyry, ond gronitoid rocks. Renton Formation Tv Nonm::,r;ne orkosic ,,mdslorle, q._.,rtzose :sondstone, siltstone, mudstone, on,;! ,hole. Macerated wood frogmentt. ore abundant. Conto;n,. m:Jny cool beds in the Renton-Newco,tle oreo. T 20 N Qm INDEX MAP OF KING COUNTY Showing Sources of Geologic Data 12 19 13 910,k 0 ""b"'" Dion>ond Toylo,• 9 l9E UO! --,- 15 17 ti •<>no,kol a (l '' 18 7 4 ' " " Tv Qo Source, of date u,ed in comp;l;ng geologic imp of King County . --- . Oc \.,. ' ,.-; = C (Numbe<S cor,espond to tho,e ,hown on inde~ mop. Complete ,eference, or e given in bibliogrcphy . ) \. Se,hel, 1951 2 . C,on<iell, 196) 3. C,ondcll o,,dWol<!,on, 1956 <. Elli,, 195> 5. F01,e,. 1%0 6. ;,lie,, 1'125 Gel"•'· 1 ~$6 S. Go,Bng, W.ol•ooo,, ond otho,,, 1965 9. Gow« and Wanek, 1963 10. iia=d, 1%) I\ Keo""''' 1959 13, Mull;ooou,, 1965, o, b. < , •• 01 ... 1956 lS. Pl""'""''• 196< 16. Pcott, 1958 17. Ri cha,d,on, Bingham, ond M:adi,o,,, 1968 te. S,och,•11. 19'1\ 19, Vino. 19620 20. Wold,on, 1901 ond 1902 21. Wo"•" ond oli,e,., 1945 Tv '& ,. ~i.. 121°30' Ji ... o, Tv TI ) - T 20 N T 19 N u 0 N 0 V, I I I I I I ul 0 N 0 w ;;: , w z w u 0 ;;: Tukwila Formation Ande,itlc volcanic sandstone, tuffoceou, 1ilhtone, tuff breccio, volcanic conglomerate, ond locally inlerbedded lava flows. G Tiger Mountain Formation Nonmorine orkosic sandstone, ca,bonr:,ceous siltitone, cloystone, ond cool. Raging River Formation Epicla,tic volcanic :sondslone and ,iltitone, locally conglomerotic, Conklin, marine fouil, locally. Swauk Formation Nonmarine orkoslc tandstor,e, pebble to cobble conglon,erate, ond shale. G N\esozoi c-early Cenozoic sedimentary rocks Groywocke, orgillite, end ,iltitone with some slate ond phylllte; inch,de, groywocke breccio end ribbon chert. 0 Puget Group Arkosic and feldspc,thic micoceoV1 sandstone, ,i ltitone, cloystone, ,hole, ond conglomerate. Conklin, the cool seams of King County. D Eocene sedimentary rocks Nonmorine sandstone with interbedded basalt, $hole, :sondstone, ond conglomerate. D Bedrock undifferentiated. G N\esozoic-early Cenozoic volcanic rocks Include,; onde,ite and ba:solt flows witt. some lnterbedded "'ndstone and chert beds. G Pre-Tertiary metamorphic rocks Mount Stuart Granodiorite Grcywacke, orgil!ite, phyllite, ond chert. Mainly gronodia<ite but ranges from cilo,ktle to gobbro. Pre-Jurassic phyllite Phyllite; include, ,moll areas of ,chis!, 0 Paleozoic rocks Pre-Jurassic schist Schist ond omphibolite; include, snxrll oreo, of phyllite cind gneiu. Q._.,rtzite, green,tone, orgillite, ribbon chert, hornfel., phyltite, and ...,,ble. Pre-Jurassic gneiss Gneiss; include, ,moll oreo, of schist ond omphiboHte.

, Qo I Qt I ~-~ · J t)file.dnr.wa.gov/publications/ger_b63_geol_min_res_kingco_pt2of2.pdf · department of natural resources division of mines and geology 14 sc, • • • •

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Page 1: , Qo I Qt I ~-~ · J t)file.dnr.wa.gov/publications/ger_b63_geol_min_res_kingco_pt2of2.pdf · department of natural resources division of mines and geology 14 sc, • • • •

DEPARTMENT . OF NATURAL RESOURCES DIVISION OF MINES ANO GEOLOGY

T

22

N

\

I

T

23

N

/

I

Qt

0

/

\ T

25 N

T

24

N

I

T 26 N I

""c:I

C (j)

rn ....

\

"'

R 3 E

T ' 21

N

,1)1\S) v Qt

S7 Qp .-1,'::i

0o -D

- t) Qt

Green lake !

,_g;. SEAT TL

g

~

I

R 4 E

)

-~ Lake "

~

~

I Washington

\ o,

I Oo

J Qo

KENT fZl

Qa

0

Qo J

'

a

7 y ,,

GEOLOGIC MAP OF KING COUNTY

0 1

WASHINGTON COMPILED BY

VAUGHN E. LIVINGSTON

1970

i 2 3 4 5 6

JR.

12 MILES

R 5 E

"

"'

Pant I, '\'Lake

""-,.

\

'

8

Qt

Qt eadow Lake·

Qt

Desire, r~Sprin Lok~ ,.,;,; - La

,, "· -l w \)( Qp

,.... I Lake

' Youngs u

R 6 E

o,

PinV. ,, C-. "''v< .

"'

MAPLE Qt

ri an

122°00'

R 7 E

~.

"

DUVALL, _ _.---

Qo

Qt

Ot

Ames la

·~-I Qt ' S<i

Qp ~ 11

n

Qo

8

I I

~ ! -~--~- Qo I

Qt

Oo .,.---.._i

• Oo > ,_.r i _ LA_!,IDSBURG ____ IT _J

N H MISH CO.

Qt

ciu

~&-£,='- - - - <:i I ;;;:, o. +; ,, fZJ SEllECK

wd .. ~~~ ~N

Lake Retreat

Tv

Tv

o,

R 8 E

~ 0 -

"

MTs

o,

r8 \,.) Klaus

Lake

Tv

"

R 9 E R 10 E R 11 E

Tv

8 _.-?,-.., -"'"'/- ---~/ ?:==~;"'\,

/ __ ____., t

I o,

:~-~·_J I I

T11t

T Reservoir ____.,

J,.--1 I / Tv I I

Ts I Calligan ~·) ,1-...,_ /r-- Lake -,~,~ °f l

I MTs

MTs

Tg

Tg ~-

"' ,,

,.

,. "''

Lake 1.... hilippa

MTs ~ /

~ ~ e e3-- MTs

0,

121°30' - , ',rr:-i:=r---"'-. . ' ~ ... ,,

~ ~

Tg

T 24 { N

Dream LokeC:,

,,

Francis v take

R 11 E

Tg

Tg

(91---- _ <>, /

Hester LakeC

---

Tv

Chester Morse

ake

Thompson LakV

'•

Cedor

Findley lakeD

:'.J Oerrick Lake

e dl"" lak '0

Pratt Lake -

0 . ..,,

Kullakulla La 0 Mason Lake

p lsland La

Tg

Lower Juscohatchie

\)Lake e

fuscohatchie lake

'

{

,,

,,

T

22

N

T

) 21

-' i f

BULLETIN 63 PLATE 1

----,

R 12 E R 13 E

Tv

••

Tv

I T

23 N

MAP SYMBOLS

Contact

'•

'

I I

,,,

Known , oppro~imote ond inferred or undifferen tiated.

Scratch boundary Con toe! uncertain or edge of mopped oreo,

------Fault

Cf,arncte, not de,;gnoted ; dc,hed where opp<oxirmte.

Thrust fault Serration, on upper plote.

,.

••

I

\

Ts

I I I I I I I I I I I

r I

I

SCENIC

Surpris'1 Lake J

Glacier"1 lake -

}

T

25

N

STEVENS PASS

T

26 N

r

V Fisher lake \p;,

""" Ptarmigan'.J lake _ \ C?,. lake ClariCeO "•

u 0 N 0 z w u

_,, Ts

/

.... z w u w

"'

T 24 N

Lake "---

,,

EXPLANATION

GJ Alluvium

Mostly unconsolidated ,ilt, SC1nd, ond grovel

volley fill with ,ome cloy. Include, orlifi­ciol fill ond peat locally.

~ Vashon ti II

Hord, blue-gray to groy concrete-like mixt'-"e of cloy, ,ilt, sond, and grovel.

Pre-Vashon deposits undifferentiated

Till, oulwash, ond os,;ocioted interglacial depo,its; sorted ond unsorted grovel,,ond, silt, ond cloy.

GJ Landslide deposits

Deformed deposits ond

debris of moss flowoge ond block ,Ude,.

Vashon outwash Advance ond recessional outwc,h, ,tratified dcift ond os,;ocioted deposits. Made up pdmorily of slit,

SC1nd, ond grove/ with some cloy.

Miocene continental sed imentary rocks

Clayey sands ond q._.,rtzose sands with some

conglomerate in the Green River oreo, Include, volcanic o,h beds ond woody lignite. In the southeastern pc,rt of the county the deposit, ore conglomerate SC1ndstone with on os,ociated andesite Flow.

8

G Oceola Mudflow Unsorted till-like mixture of gronule - to - cobble -

slzed rock fu:igments in cloy, silt, ond SC1nd motrlx.

Glacial and alluvium deposits undifferentiated U,,con,ol;datedolluvial silt, :sond, and gravel; ,mitifled outwash grovel, .ond, si It, ond day; Iii I compased of unsorted cloy, sand, cobble,, ond boulders.

G Peat

Chiefly decomposed vegetc,I molter. Some bog, contatn thin cloy, diotomite, ond pumice beds.

Snoqualmie Granodiorite

D

Principal rock type is gr<modiorite but locally includes granite and quortz

diorite.

Tertiary volcanic rocks Oligocene sedimentary rocks

Well cemented dark gray marine ,iltst0t1e and light gray mudstooe with some groy­wccke "'ndstone and ,:onglomerote beds.

Mo,tly ondesite brecclo, and onde,ite flows. Basalt, rhyolite, ond luff, cl,o pre.,.,nt.

Tertiary intrusives Include, dikes, plugs, ,tocks, and sill, of rhyolite, /omprophyre, ondestte, onde,i!e porphyry, ond gronitoid rocks.

Renton Formation

Tv ~ Nonm::,r;ne orkosic ,,mdslorle, q._.,rtzose :sondstone, siltstone, mudstone, on,;! ,hole. Macerated wood frogmentt. ore abundant. Conto;n,.m:Jny cool beds in the Renton-Newco,tle oreo.

T

20

N

Qm

INDEX MAP OF KING COUNTY Showing Sources of Geologic Data

12

19

13

910,k 0 ""b"'" Dion>ond

Toylo,•

9

l9E UO! --,-15

17

ti

•<>no,kol

a (l ''

18

7

4 ' " "

Tv

Qo

Source, of date u,ed in comp;l;ng geologic imp of King County .

---. Oc \.,. ' ,.-;

~

= C

(Numbe<S cor,espond to tho,e ,hown on inde~ mop. Complete ,eference, ore given in bibliogrcphy . )

\. Se,hel, 1951

2 . C,on<iell, 196)

3 . C,ondcll o,,dWol<!,on, 1956

<. Elli,, 195>

5. F01,e,. 1%0

6. ;,lie,, 1'125

Gel"•'· 1~$6

S. Go,Bng, W.ol•ooo,, ond otho,,, 1965

9. Gow« and Wanek, 1963

10. iia=d, 1%)

I \ Keo""''' 1959

13, Mull;ooou,, 1965, o, b. <

, •• 01 ... 1956

lS. Pl""'""''• 196<

16. Pcott, 1958

17. Ri cha,d,on, Bingham, ond M:adi,o,,, 1968

te. S,och,•11. 19'1\

19, Vino. 19620

20. Wold,on, 1901 ond 1902

21. Wo"•" ond oli,e,., 1945

Tv

~ '&,.

~i.. 121°30' Ji ...

o,

Tv

TI

)

-

T

20

N

T 19

N

u 0 N 0 V,

~ I I

I I

I I

u l

0 N 0 w ~

;;:,

w z w u 0 ~ ;;:

Tukwila Formation Ande,itlc volcanic sandstone, tuffoceou, 1ilhtone, tuff breccio, volcanic conglomerate, ond locally inlerbedded lava flows.

G Tiger Mountain Formation

Nonmorine orkosic sandstone, ca,bonr:,ceous siltitone, cloystone, ond cool.

Raging River Formation Epicla,tic volcanic :sondslone and ,iltitone, locally conglomerotic, Conklin, marine fouil, locally.

Swauk Formation Nonmarine orkoslc tandstor,e, pebble to cobble conglon,erate, ond shale.

G N\esozo ic-early Cenozoic

sedimentary rocks Groywocke, orgillite, end ,iltitone with some slate ond phylllte; inch,de, groywocke breccio end ribbon chert.

0

Puget Group Arkosic and feldspc,thic micoceoV1 sandstone, ,i ltitone, cloystone, ,hole, ond conglomerate.

Conklin, the cool seams of King County.

D Eocene sedimentary rocks

Nonmorine sandstone with interbedded basalt, $hole, :sondstone, ond conglomerate.

D Bedrock undifferentiated.

G N\esozoic-early Cenozoic

volcanic rocks Include,; onde,ite and ba:solt flows witt. some

lnterbedded "'ndstone and chert beds.

G Pre-Tertiary metamorphic rocks Mount Stuart Granodiorite

Grcywacke, orgil!ite, phyllite, ond chert. Mainly gronodia<ite but ranges from cilo,ktle to gobbro.

Pre-Jurassic phyllite Phyllite; include, ,moll areas of ,chis!,

0 Paleozoic rocks

Pre-Jurassic schist Schist ond omphibolite; include, snxrll oreo, of phyllite cind gneiu.

Q._.,rtzite, green,tone, orgillite, ribbon chert, hornfel., phyltite, and ...,,ble.

Pre-Jurassic gneiss Gneiss; include, ,moll oreo, of schist ond omphiboHte.

Page 2: , Qo I Qt I ~-~ · J t)file.dnr.wa.gov/publications/ger_b63_geol_min_res_kingco_pt2of2.pdf · department of natural resources division of mines and geology 14 sc, • • • •

DEPARTMENT OF NATURAL RESOURCES DIVISION OF MINES AND GEOLOGY

14 Sc,

• •

0148

• 41

30~ 0306

c;,3~03

~302

~ 307 0309 J/2 0308

0 • 311"" 1

c::{10

1)313

OJ/4

0318

'<)319 316

J2o~ r:l21

~

0 8

~ /50

ill,,.

()?37

149

r::y,52

0 153

156 r ,zj57 c:£55

• 158~ 59

29

!,60 <:::J/61

(Y2

030

40 '031 0 039

042

~ ~ 44

~ 43

~ 48

T

• • flBB

• 12 @

89 =

~ 34 ,,, tJ38

90

o26

0 35

"36

IJ37

45~

46

315

391)

NONMETALLIC MINERAL

IN

58 59

323 • • D3zz • •

~ 24

3 26 ,.S 0 l!)

206 •

0240

1)202

~ 325

327

v •

••

l,28

~ 64

165

• •

• 8(;)

0 /66

ton Coal • d • 12@

~ /69.

172 • 'Sf' "---. 170

~~ ~ 94 ~ 95 •

a.

o9• J OI ,/l,9'

<So?

0,49

100 98 d JQJ 99 ~ ~'u /05

0 104

106 I,] 'iJ /08

• 50 =

53

5 4'°"' ,:_a52 55~ :

DEPOSITS

WESTERN KING COUNTY, WASHINGTON

0 1 2 3 4 5 6 MILES -- ---

335 ~ 31 \).'33

330

V334 \J329

~ ,·<ff' 337 °JJ8

0,H9 0 3 40 3 41

D34 4 0 342 = 343

c:!J345

,;346 ~47

C 0348 3491":J

f::;351

0 352

'256 253

~ I\ rr2>2"'251

<{,255 1254~ V 257 ~ 264

(72s9260 a 26J ~ G cy261 • [1 t::::,z52

258 ~ ~266

267~

D

'if},265

c::,272 269 7

~ 273 271 "v• \ r:,z70

~ 74

212 le_ ~ 211

~ 213 =y210

209 0 0i207

Joa (J218

214D ,:,215\1."' «c:::::]217

lj /6

~ /~·

'\i /78

176 177

= """ Cedar Mountain Coal Field

'b /80

182

J~ 0 18.J

12@ (Piss

't,1a4

~~

0 112 ~ l/0 !IS (::::::, 114

0 113 "::J 111

0 116

"<25

~ 7 '¥,24

126 ===J

V,' 121 /33

~ 34

• TB

(]

0128 <:::::j,29

~ !JI

~ /32

3135

68 ef9 CJ

D

10 0

79

12 119 1180 <:,

0

0121

'"i:?122

/30~

• /4

(jJ /l

~ 356 354 6 353

0355

360 ~

358 0

0 359

f!.354

27? ~· (:y75

'\i278

0280 279§

81 286

' 282 2 87'0,

j/ 2e3a ~84

C/285

289 [5'288

Q 29/ G293 <J290

294

~ 224

225 ~

228 0226

~ 227

0229

230

0 86 \ Nib

'E4 Coa er Mountain I Field

18T ~-189

18 8 N

(f!45

'{j/46

gs,

'0BO

I

.. V23A-C <;J'2

013

• 14

,s •11 19 (:@16 18@~

• ir,213 20 17

23 0 llz4

Taylor Coal Field

• •

• Kono,ket

295

6296

BULLETIN 63 PLATE 2

~ 97

~ 300

0298

0299

231

'j/32

•°tz33 234

's3235

193

y;,0191 94

o,k

'90

Field

r::::::,197 1960

""195

,/98

EXPLANATION

" Mined out coal seams

.- Fault

'Y Coal seam showing dip

23

D Peat bog

• Producing peat bog in 1969

1 Acme American Peat Moss

2 Arbor Lake Garden Supply

3 Arbor Lake Humus Co.

4 Bow lake Humus Ca . s Carlson Peat and Wood

6 Puget Peat Producers

7 Tri lakes Humus

,• 2 Clay deposit and sample No.

02 Clay pit producing in 1969

I Palmer

2 Elk

3 Blum

4 Horris

5 Section 31

6 Newcastle

7 Renton

B Lone Star

• Sand and gravel pits

® 3 Sand & gravel pit producing in 1969

Alberg & Associates In!:.

2 Black River Quarry Inc .

3 Cadman Gravel Co.

4 Churchill Sand & Gravel

5 Cottage Lake Gravel Co., Inc.

6 Kirkland Sand & Gravel Inc .

7 Lakeside Gravel Co., Inc.

8 Miles Sand & Gravel Co.

9 Reid Sand & Gravel , Inc.

10 Rock & Sand , Inc.

11 Stergion Concrete Products

12 Stoneway Concrete, Inc.

13 Tougaw & Olson, Inc.

14 We stern Sand & Gravel Co.

Page 3: , Qo I Qt I ~-~ · J t)file.dnr.wa.gov/publications/ger_b63_geol_min_res_kingco_pt2of2.pdf · department of natural resources division of mines and geology 14 sc, • • • •

0 ::0 0

== gi z' N Ul rrl IT1

0 z -t Po I\) z

0 ...,

"' "' • g ... :;: "'

&.o -A 0) .0 0

0 ". 0

"' "' "'· ... • a a a a .. .. ~ "' ,. a, ...

0) -A . .. .... .. .,,"' .. , 0 ,;;:..- .f\J.::, § ·:::C:

" "' • -" "' "'

"' a.

a

" "' ~ a

"' z

"' ... a "' ... N

• a, "' a, "' • • • z -" a a g a

a ... "' ... a g ~ "' "' ... "'

• " Q -

"' ... a. -a "' "'

g ...

,. ,;, ..,

a: l> z

"' a • .. ~ $" g ...

~ a

t~ 0 :,. 0

,, "!.

a a "' 0

a "' • 0

• 0

00 'i'

IT1 X -u r l> z =1 0 z

v., 0

~"i'o

;:: l> "O

l> z C,

l> en en

z G)

~ () 0

~~ ..., ., ;;o -< 0 • ;::

~~ ~ CJ)

I ,.-1 -a, z ~ G) C, .,

;l; 0 rZ r "' ;;o

/•

/•

0 r,

0 r rn 0 -u ~ ::0 l>

-u ::0 0 -u rn ::0 ...... -<

.. ~c ~~

!:j~ m::! .. z .. ~

M • z• ~w ~< "" :,~ ~

"

• 0 z

'

w z ::.

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Page 4: , Qo I Qt I ~-~ · J t)file.dnr.wa.gov/publications/ger_b63_geol_min_res_kingco_pt2of2.pdf · department of natural resources division of mines and geology 14 sc, • • • •

TABLE 3. - Generalized description of . .

engineering properties of geologic map units shown on Plate l

[ Modified from Waldron and others, 1962]

MAP UNIT DESCRIPTION SPECIAL FEATURES DRAINAGE GROUND WATER EASE OF EXCAVATION FOUNDAT!ON STAS! LITY SLOPE STABILITY SEISMIC STABI UTY REPORTED OR POSSIBLE USE

Mostly uncor,solidoted silt, sand, ond Includes beach sand and orti fi cio I fi 11. Runoff variable but genero!ly poor Water table near surface. Permeobi Ii ty General ly easy to excavate with hand Fair; may settle excessively and irregu- Generally poor because of saturation. Very poor. Maximum destruction during Fill, topsoil for lawns and gardens,

gravel. Volley fill wi th some cloy. Contains interbedded peot and muck because of low slopes. Infiltration variable, or power equipment. Con generally be lady because of loyers of compressible Moy stand in steep cuts for short periods Apri I 1949 earthquake occurred oe I concrete and asphalt aggregate.

Alluvium Includes artificia l fil l ond peal loco/ly. locally. moderate to very slow. Subject to dredged. organic material. where above water table. alluvium and ar t ificial fill. Alluvium in Duwamish Volley contains

Oo flooding along many rivers and creeks glossy volcon;c material, probably

in western lowland p:,rt of county. reoct;ve in high-alkali concrete.

Deformed deposits and debris of moss Includes intim::itely mixed material from Ru naff poor. Slide movement produces Waler table generally close la surface. General ly easy to excovate w;th hand Mostly unsuitoble. Correction measures Both natural and cut slopes generally Very poor.

flowoge and block slides. vorio,H units, ond discrete blocks of depressions that catch and hold water. Permeobi lily genera I ly low. or power equipment. needed. : unstable. Landslide

Infiltration slow in slides of glacial 01,

various units.

mater ial. Springs com manly associa ted

with slides.

Unsorted till-like mixture of granule- Unsorted till-like mixture of granule-to- Runoff poor because of flat topography Usually soturoled, bu t not o source of Difficult to excavate with hand or light Generally good, no sett l ing expected. Stonds in steep nolurol ond cut slopes. Good. Fill. D,;eolo mudflow to-cobble-sized rack frogmenls in cloy, cobble-sized rock fragments in clay, si It, and high cloy content. Infiltration ground water because of low perme- power equipment. Foirly compact, lockr Rave ls and spolls with wetting and

Om silt, and sand matrix. and sand motrix. slow . abil i ty. Organic debris and pyrite bedding . drying, and freezing ond thowing.

moy affect quolity of ground water.

Chiefly decomposed vege tol motter. Highly mobile; low shear strength. Water Runoff poor, material usual ly accumulates Water table at or near surface. General ly easy lo excovote with hand Very poor; will settle excessively under Not generolly found on noturol slopes. Very poor. Source of organic material for top soi I Peat Some bogs contain thin cloy, diotomile, content may be as much os !O times dry in closed depressions. Infiltration Permeobi !ity variable. or power equipment. Con genero l ly be food. Low beoring capacity. Cut slopes variable. Peat in upper few beneficiotion. Qp ond pumice beds. weight. Generally is ocidic. Includes moderote when dry, but generally dredged. Moy contain large logs. feel of deposit will stond in steep cuts;

inorgonic cloy ond si It. saturated. Seosono ! flooding common. lower peat may run freely when wet.

Advance and recessionol outwosh, Usually poorly sorted, ungraded, and Runoff poor to fair on natural surfaces; Presence depends on topography and Moy be excavated with hand or light Fair lo excel lent, but moy be poor on Generally umtoble on slopes steeper than Good. Rood metal, concrete and osphalt slrotified drift ond associated deposits. uncemented. VVhere unit overlies poor where vegetotion and soil fmve been underlying moleriol. Contains perched power equipment. Moy be poorly slopes tho t approoch the ong!e of repose. 30° except where silt or tloy binder is oggregote, droin field grovel, fl 11

Voshon outwosh Mode up primorily of silt, sand, oed impermeable materiol, springs near base removed. Infiltration moderate on ground water in lower p:,rt in mony areas. cemented locally . Uttle settl ing may occur loco lly. present. Slope failures usually extend to o, grovel. Some cloy is present. co use eros ion and sliding of sandy slopes with natural roil ond vegetation High permeability. o depth of only a few feet. Moy stand

phoses. cover, but fast where these hove been in steep cuts for short periods.

removed. Springs common near base.

Hord, blue-groy ta groy concrete-like Unsorted mixture of cloy, sand, and Runoff voriob le. Undro ined and poorly Height of water table depends on Very difficult to excovote with hond Exce l lent . No settling expected. Stands in steep noluro l ond cut slopes for Good. Fil I. mixture of cloy, sil t , sand, and grovel. grovel sized moleriol. l'hly contoin drained depressions common. Runoff topography. Permeobility very low or light power equipment. Dense, long periods. Moy ravel and spoil by

Vashon Ii II loco I lenses of sand and grove l. le good on steep slopes. Infiltration very except in contoined lenses of sand ond tough, ond cohesive . Generally wett ing and dry ing, and freezing and QI some areos till is thin ond consists of slow. grovel. locks bedding or extensive fracturing. thawing.

loose silty sand and gravel, but else-

where is thick ond comp:,ct.

Till, oulwosh, ond associated interglacial Much vertical and lateral voriotion Runoff vorioble. !nfiltrotion slow. Generolly contains water, much of which Variable, but generolly difficult ta Fair la excellent , depending on loco! Highly vorioble. Till, silt, and cloy Good. Fill, common brick and other clay deposits; sor ted and unsorted grove I, sand, of physical properties . lnterbedding Springs ond seeps common. is under high hydrostatic heod. excovote with hand or light power conditions of slope and ground woter con- may stand in steep cuts. Grovels may products. Some interbedded sands silt, and cloy. of moteriols having different size ronge Permeobility !ow to high, depending equipment. Campoct ond cohesive. ditions. stand in sleep cuts for short periods. contain minerols, probably reactive

and engineering properties to be on texture. Locolly cemented. Till lacks Abundont silt and cloy, together with with high-olkoli cement . Pre -Vashon deposits expected. bedding or fractures. contained water under high hydrostatic

undi fferentioted head, results in faw noturol slopes.

Q Shear strength of cloy ond sil t obtoined by

loborolory tests moy not be applicable in

field becouse of fracturing. Subject to

landsliding. Rebound repor ted in cloy

and si lt.

Unconsolidated o l luvio l si It. Sand, and Unconsoli doted silt, cloy, sond, and Runoff varies from poor lo good, depend- Presence and quo I ity of wot er depends Vcirioble. Poorly compacted moteriol Variable- poor to good depending on High ly voricsble . Moy stand in cuts and Poor to good, depending on the Loco l ly some os Oo, Qo, end Q . Glacial and grovel; stratified oulwosh grovel, sand, gravel; may contain some peat. We ll ing an surface topography, makeup of on subsurface materia l and lopogrophy. may be excovoted with hand or light the subsurface moteriol. Settling may steep noturo l slopes. Slopes steeper than underlying materio I.

alluvial deposits silt, and cloy; till composed of unsorted stratified to unstratified. Wide voriotion subsurface moteriol, and vegetol caver. Permeobility variable depending on power equipment. Compoct cohesive occur in some areas because of com- 30° may cause trouble, and in some areas undi fferentioted cloy, sand, cobb!es, and bou lders. in physical and engineering properties . Infiltration highly variable. subsurfoce material. material is tough and is generally hord press;ble layers . Slope ond ground flatter slopes will be unstoble .

Oo to excovote with hand or light power water may be factor, a Isa.

equipment.

ALL FORMATIONS BELOW ARE BEDROCK

Miocene Friable clayey sandstone,

continen tal Clayey sonds and quortzose sands and poorly Runoff exce llent; infiltration slow. Permeability low, probably contains Heovy equipment needed. Ripper Excel lent, but subject to limitations of Stands for long periods in sleep cuh Good. Source of koolinite cloy and gloss sand. some conglomerote, cong lomerate sond- cemented. very little wa ter. or power shovel usually odequote. slope. and slopes. deposits stone, and ondesite flows.

M

Oligocene Wei I-cemented dork-gray mori ne si ltstone Partly cemented, but may be weothered Runoff e,<cellent; infiltrotion slow. Permeability low. Slostlng and heovy power equ;pment Excellent, but subiecl to slope !imlto- Stands for long periods in steep natural Good. Fill. sedimentory ond light-groy mudstone and some groy- near surface. Contains some opal Few springs. required for excavation. lions. No sett ling expected. banks and cuts. Dip of beds may rocks

~ wocke sandstone and conglomerate beds. cement. affect slope stab;Jity,

Renton Nonmorine orkosic sandstone, quortzose Portly cemented, but contains Some as above. Some os obove. Some cs above. Some as above. Some os above. Good . Fll I, coo I, common cloy, foundry sand. Formation sandstone, sil tstone, mudslone, oed uncemen ted beds .

T, shale. Contains cool beds.

Tukwilo Andesit ic vo!conic sandstone, tuffoceous Portly cemented. Moy be weothered ot Some as above. Some os above. Some os above Some os above. Some os obove. Good . Fill. Formation silBtone, luff breccio, volcanic surface; contains volcan ic luff beds.

Tl conglomerate, ond local lava flows.

Tiger Mountain Nonmarine arkosic sandstone, Cloy cemented, weathered ot surfoce. Same cs above. Some as above. Some as above. Some as above. Some os above. Good. Fi l I. Formation carbonaceous si I ts lone, cloystone, Locol!y may be hydrothermally altered.

Tim ond coal.

Roging River Epiclostic volcanic sandstone and Portly cemented; some beds ore friable. Some as obo~e. Some as above. Some as above. Some as above. Some os obove. Good. Fi 11. Formation

T" sllhtane, locolly conglomerotic.

Arkosic and feldspothic m;coceous Portly cemented; may be deeply Some os above. Some as above. Some as above. Some os obove. Some os above . Good. Fill, cool, glass sand, cloy . Pugel Group

sandstone, siltstone, sha le, ond weathered at surface. Tp

conglome rate.

Eocene Nonmorine sandstone and interbedded lnterbedded with volcanics. Some os obove. Some as above. Some os above . Some as above. Mostly Some as obove. Good. Fill, riprop. sedimentary base It, shale, sandstone, and conglom- well cemented ond fmrd.

rocks

E erote.

Swauk Nonmorine orkosic sandstone, pebble We/I cemented, jointed. Altered in some Some cs above. Some as obove. Some as above. Some as above . Some as obove . Good. Fi 11. lo

Formation cobble cong lomerate, and shale. pieces . Ts

Mesozoic-Mostly well cemented, foirly highly Some as obove. Same as above . Some os obove. Some as above. Groywocke, orgil lite, ond siltstone ond Some as obove. Good. Fill. early Cenozoic

some slote end phyllite; includes groy- join ted. Locolly hydrothermally altered sedimentary rocks

wocke breccio and ribbon chert. ond soft. MTs

Snoqualmie Gronodiorite, gronite, and quortz Hord, firm rock. Altered locolly. Some os above. Some os above. Ground water only ;" Some os obo·ve. Breaks along joints. Excellent. Stonds for long periods in steep natural Good. Fill, riprop, chicken grit, londscope Gronodiorite diarite. Jointing well developed. joints. banks ond cuh. stone, bal lost, crushed rock. Tg

Tertiory Mostly ondesite breccio, end ondesite Medium hord rock, locally soft. Some as obove. Low permeobility. Blasting ond heavy power equipment Excellent, but subject lo slope /imito- Same as above. Good. Fil), riprap, landscape stone. volcanic flows. Boso It, rhyolite, ond luffs Commonly jointed. In ploces contoins required for excavation. lions.

rocks also present . much a ltered luff .

T,

Dikes, plugs, stocks, and sills of /v\ostly hard laugh rock. Canto ins zones Some as above. Some as above . Ground water only in Same as above. Breaks along joints. Excellent. Some as above . Good. Fill, riprop, bol losl, crushed rock, Tertiary rhyolite, lomprophyre, ondesite, of alteration. joints. aggregate, londscope stone. intrusives ondesite porphyry, and gronitoid

T) rocks.

Mesozoic-

early Cenozoic Andesite and bosol t f lows including some Highly jointed, contains sedimentory Same as above. Some as above . Some os above. Some as above. Some os above. Good. Fil I, riprop. volconic rocks ; nlerbedded sandstone ond chert beds. rock inlerbeds.

MT•·

Pre-T ertiory Groywocke, orgillite, phyllite, and Highly jointed. Compocl, hard. Some as above. Some as above. Some os above. Some os above. Some as above, Good. Fill. metomorphics chert . pT

Mount Stuart Moinly gronodiori te, but ranges from Hord, firm rock, jointing we)/ Some as above. Some as above, Some as obove. Some as obove. Some as above, Good. Fill, riprop, bo l lost, crushed rock, Gronodiorite oloskite to gobbro. developed.

Mg oggregole.

Pre -Jurossi c Moinly phyllite, but includes smo ll Fairly soft, eosily weothered and Some os obove. Same as above. Some as obove. Is most eosi ly broken Some os obove. Some as above . Good. Fi 11. phy/l;te oreos of schist. eroded. along rack cleavage plones.

pJp

Pre-Jurossic Schist and omphibolites; includes smal l Foirly soft . Bonded ond contorted. Some os above. Some as above. Some os above. Some as obove. Some os above. Fil I. Good. schist

pJs oreos of phy!lite and gneiss.

Pre-Jurassic Gneiss; inc ludes small areas of Hord, dense, firm rock. Jointing Some os above. Some as obove. Some os obove. Breaks up along joint Some os obove. Some as above. Good . Fill, riprop.

gneiss schist ond omphibo lite. sometimes well developed. sys tems. pJg

Paleozoic Quartz, greenstone, orgillite, Composition highly vorioble. Some as obove. Some as above. Some as above. Rock type controls Some as above. Some os above. Good. Fill, riprap, cement, agricu ltural

rocks ribbon chert, hornfels, phyllite, eose of excavation. limestone.

IP ond morble.

Page 5: , Qo I Qt I ~-~ · J t)file.dnr.wa.gov/publications/ger_b63_geol_min_res_kingco_pt2of2.pdf · department of natural resources division of mines and geology 14 sc, • • • •

COMPAN,

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