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7/30/2019 Tatap Muka 1
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TATAP MUKA 1
KOMPETENSI DASAR :Menjelaskan ruang lingkup
Geologi
INDIKATOR PENCAPAIAN :
Batasan geologi, ruang
lingkup, ilmu-ilmu terkait
Cara mempelajari geologi
Sistem dalam geologi
Profesi yang berhubungan
dengan geologi
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RUANG LINGKUP GEOLOGI
• Pengertian dan cara belajar geologi
• Ilmu-ilmu terkait dengan geologi• Sistem dalam geologi
• Mengapa belajar geologi?
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Pengertian dan cara belajar geologi
• Geology is the study of the Earth as a whole, its origin,structure, composition, and history (including thedevelopment of life), and the nature of the processeswhich have given rise to its present state.
Whitten, DGA and Brooks, JRV. 1977. The Penguin Dictionary of Geology . Middlesex: Penguin Books. p. 204.
Pertanyaan:• Cari definisi lain dari buku-buku geologi
berbahasa Inggris di Perpustakaan Pusat.
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• Mengikuti pendidikan kebumian
• Lokatama untuk belajar geologi:
– Perpustakaan termasuk internet
– Laboratorium (studio) dan museum geologi
– Lapangan• Sebagaimana pembelajaran ilmu alam yang lain, dalam
menghadapi bahan atau fenomena geologi perludilakukan:
– Observasi (pengamatan), – Analisis, dan
– Sintesis
Pengertian dan cara belajar geologi
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Perhatikan• Belum dikatakan belajar geologi sebelum ke
perpustakaan, laboratorium, dan lapangan(survei)!
• Apakah FTM UPN “Veteran” Yogyakartamemfasilitasi pembelajaran di 3 (tiga) lokatama−termasuk museum− tersebut di atas?
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Ilmu-ilmu terkait
MATEMATIKA
FISIKA KIMIASTATISTIKA
HIDROLOGI
GEOLOGIBIOLOGI
METEOROLOGI
ILMU-ILMUDASAR
ILMU-ILMUDASAR
KEBUMIAN
ILMU-ILMUTERAPAN
TEKNOLOGI
GEOLOGIMINYAKBUMI
GEOLOGIBAHAN GALIAN GEOLOGI
PANASBUMI
GEOLOGITEKNIK
GEOLOGILINGKUNGAN
TEKNIK PERMINYAKAN
TEKNIK PERTAMBANGAN
TEKNIK SIPIL
INDUSTRIPARIWISATA
DLL
DLL
PLANOLOGI
GEOARKEOLOGI
TEKNIK PANASBUMI PERTANIAN
PEDOLOGI
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Ilmu-ilmu antara
FISIKA
KIMIA
STATISTIKA
HIDROLOGIGEOLOGI
BIOLOGI
PARIWISATA
GEOFISIKA
GEOHIDROLOGI
GEOKIMIA
GEOSTATISTIKA
PALEONTOLOGI
GEOWISATA
DLL
Pertanyaan:
• Mengapa muncul ilmu-ilmu antara?
ARKEOLOGIGEOARKEOLOGI
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Cabang-cabang geologi
GEOLOGI
Pertanyaan:
• Mengapa banyak cabang-cabang geologi?
DLL
MINERALOGI
PETROLOGI
GEOMORFOLOGI
GEOLOGISTRUKTUR
STRATIGRAFI TEKTONIKA
PALEONTOLOGI
VOLKANOLOGI
GEOLOGISEJARAH
SPELEOLOGI LIMNOLOGI SEDIMENTOLOGI
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Yang dipelajari Geologi a.l.:• Batuan : Petrologi
• Urutan perlapisan batuan : Stratigrafi
• Arsitektur litosfera : Geologi Struktur
• Kehidupan purba : Paleontologi
• Kegunung-apian : Vulkanologi
• Pengendapan batuan : Sedimentologi
• Bentuk permukaan : Geomorfologi
• Terjadinya bahan tambang
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Petrologi
• Terbentuknya batuan
• Jenis-jenis batuan
• Komposisi batuan• Struktur dan tekstur batuan
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Stratigrafi
• Urut-urutan lapisan
• Umur tiap-tiap lapisan
• Hubungan antar lapisan
• Variasi tiap-tiap lapisan
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Geologi Struktur
• Lipatan: antiklin, sinklin
• Sesar/Patahan
• Kekar/retakan
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Paleontologi
• Terjadinya fosil
• Bermacam-macam organisme purba
• Umur fosil/batuan yang mengandungnya• Lingkungan kehidupan purba
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Geomorfologi
Bentuk Positif: gunung, bukit, pegununganBentuk Negatif : lembah, saluran
Dataran
Proses yang membentuk morfologi:pelapukan, pengikisan
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Vulkanologi
Terjadinya gunung api
Kegiatan gunung api
Tipe-tipenya
Hasil aktivitasnya
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Hidrogeologi
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Air di Dalam Batuan
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PROSES GEOLOGI
EKSOGEN
(EKSTERNAL)
ENDOGEN
(INTERNAL)
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PROSES ENDOGEN
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PROSES EKSOGEN
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Gerakan massa tanah/batuan
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RUANG LINGKUP GEOLOGI
• Pengertian dan cara belajar geologi• Ilmu-ilmu terkait
• Sistem dalam geologi• Mengapa belajar geologi?
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Initially, … it was an homogenous material
GEOSPHERE
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ATMOSPHERE
SOLID EARTHHYDROSPHERE
BIOSPHERE
GEOSPHERE
Diversifications …
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BIOSPHERE
SOLID EARTH(LITHOSPHERE TO CORE)
ATMOSPHERE
HIDROSPHERE
GEOSPHERE
Dynamic equilibrium
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RUANG LINGKUP GEOLOGI
• Pengertian dan cara belajar geologi
• Ilmu-ilmu terkait• Sistem dalam geologi• Mengapa belajar geologi?
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Why Study Geology?
Because geology is all around us.
• 1. Geological Resources
• 2. “The Environment”
• 3. Geological Hazards(Changes posing risks)
• 4. Engineering
• 5. Landforms and Surface Processes
• 6. Historical Geology
Geology forms the basis of our great civilizations
Environmental
Geology
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Why Study Geology?
– The Cradle of
Civilization (Fertile
Crescent) – Development limited
by availability, e.g.,
soil, water, energy
– Conflicts based onresources, e.g.,
water, minerals, oil…
http://encarta.msn.com/
1. Geological Resources
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The Cradle of Civilization
Sprung from geology of the region
Tigris River, Iraq
http://encarta.msn.com/
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Misuse of Resources
These Maps illustrate theFertile Crescent in 1973 (top)and 2000 (bottom).Permanent marshlands,pictured in green, have shrunk90 percent in that period.
Illustration courtesy United NationsEnvironment Program
2. The Environment
Mi f G l i R
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Misuse of Geologic ResourcesDesiccation of the Aral Sea, Kazakhstan
http://www.grida.no/aral/aralsea/english/arsea/arsea.htm
2. The Environment
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Overuse of Geologic Resources
• 1.7 billion are joining the consumer classand the environment won’t sustain thisstandard of living (Worldwatch Institute 2004)
• Emissions of Greenhouse gasses isaccelerating global warming
• Climate change is accelerating melting of glaciers and driving mass extinctions(The Centre of Biodiversity and Conservation, Leeds
University, UK)
2. The Environment (Geology in the News)
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Geology in the News
• Two die in 6.5magnitude
Earthquake near
San Lois Obispo
California• Earthquake triggers
mudslides
http://news.nationalgeographic.com/news/2003
3. Geologic Hazards
San Andreas Fault
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Assessing Risk“Major Quake Likely to
Strike San Francisco
Bay Region Between
2003 and 2032”
• Assessing Risks
• Avoiding Risks• Preventing
Damage
• Predicting Impact
3. Geologic Hazards
http://quake.wr.usgs.gov/research/seismology/wg02/
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Earthquake
Bam, Iran
• A Magnitude 6.5Earthquake hits astone- and mud-
house city of 100,000 in Iran 12-26-03
– 30,000 Dead
– 30,000 Refugees• US sends aid and
releases sanctions
• Relations improved
Photos
from AP
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3. Geological HazardsVolcanoes
Landslides
Earthquakes
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4. Geology in Engineering
Slope Failure Risk Assessment and Control
To prevent slope failure engineers must understand the
geology that forms and controls the slope
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Geology in Engineering
Committee member John
Burland, an engineer,
promoted soil extraction as the
best way to save the tower.
I n Pisa the ti lted one is back in
business after an 11-year effort
to keep it f rom collapsing
The Leaning Tower Straightens Up
www.smithsonianmag.si.edu
Engineers use knowledge of
geology to design, protect
and correct structures
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5. Landforms and Surface Processes
• Glaciers
• Mass Wasting
• Streams
• Shorelines
• Deserts
• Groundwater http://www.berann.com
H.C. Berann (1915-1999)
Yosemite National Park, 1987
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Sub Disciplines Areas of Study Which Rely on Geology
• Environmental Geology
– Environmental Sciences: how we influence
the earth
– Geologic Hazards: how geology influences us
• Engineering Geology
– Geologic Materials
– Foundations
– Geotechnical engineering
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• Geological Resources – Locating and characterizing amounts and quality
– Extracting and
– Understanding environmental effects of extraction and use (misuse, overuse) of
resources
• Historical Geology
– Deciphering Earth History and
– Evolution of life
Sub Disciplines (cont.)
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TEORI TEKTONIK LEMPENG(PLATE TECTONIC THEORY)
Semua proses dan hasil proses
geologi diakibatkan oleh dinamika
kulit bumi (litosfera) yang
bentuknya pipih, seperti lempeng
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Karena:
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Karena:- tataan geologinya
- tataan tektoniknya:
• Indonesia kaya akan:
- Sumberdaya mineral: bahan tambang(emas, perak, tembaga, timah putih,minyak & gas bumi, pasir, batu, dll
- Bencana alam: gempa bumi, tsunami,gunungapi, tanah longsor, dll
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Dengan demikian geologi digunakan dimana saja?
• … • …
• …
•