234 D. Submarine Geology and Geophysics OLR (1986) 33 (3)

Reconstruction of tectonic movements since the initiation of the Gulf of Suez rift indicates that there has been 25-27 km of extension. The uplift border- hag the rift indicates that lithosphere heating greatly exceeds that producible by uniform lithosphere extension. It is suggested that small-scale convection induced by the rifting augments the heating intro- duced by extensional rifting and produces the broad uplifts flanking the rift. Lamont-Doherty Geol. Observ., Palisades, NY 10964, USA.

previously derived reaction constants. Although there was good general agreement between model predictions and observations, it was found that some samples had progressed anomalously far for their respective depths, and may have been impregnated with oil. Extrapolation of these studies suggests that the Verrill Canyon formation and its equivalents are mature and may have entered the oil generation zone in Tertiary time. BP Res. Centre, Chertsey Rd., Sunbury-on-Thames, Middlesex TWI6 7LN, UK. (hbf)

D330. Oil and gas

86:1612 Chen, Zongqing, 1985. Stratigraphlc dassification

and corrdation of carboniferous tidal flat area in Sichll~ Province, China. Significance in

gas prospecting. Acta geol. sin., 59(2):87-96. (In Chinese, English abstract.) Sichuan Inst. of Petroleum Geol. Prospecting and Develop., Min. of Petroleum Industry, People's Republic of China.

86:1613 Gluyas, J.G., 1985. Reduction and prediction of

sandstone reservoir potential, Jurassic, North Sea, Phil. Trans. R. Soc., (A)315(1531):187-202.

Analysis of the porosity, permeability, mineralogy, and depth data for 2 sandstone sequences reveals that although sequence A is only 3% more porous than B, its permeability is 1-3 orders of magnitude greater than B. This difference is attributed to the presence of abundant authigenic clay in B (absent in A), which was precipitated from pore water expelled from clays during compaction. Sedimentol. Branch, BP Petroleum Develop. Ltd., Britannic House, Moor Lane, London EC2Y 9BU, UK. (hbf)

86:1614 Heasler, H.P. and R.C. Surdam, 1985. Thermal

evolution of coastal California with application to hydrocarbon metm'ation. Am. Ass. Petrol. Geol. Bull., 69(9):1386-1400. Dept. of Geol. and Geophys., Univ. of Wyoming, Laramie, WY 82071, USA.

86:1615 Mackenzie, A.S., C. Beaumont, R. Boutilier and J.

RulikOtter, 1985. The aromatization and isomeri- zation of hydrocarbom and the thermal and mlmideaee history of the Nova Scotia margin. Phil. Trans. R. $oc~ (A)315(1531):203-232.

Temperature history is used to predict the reaction extent of steroid hydrocarbons on 33 samples with

D340. Manganese nodules, etc.

86:1616 Putilina, V.S. and I.M. Varentsov, 1985. Experi-

mental data on the formation of iron-manganese ores in current basins: the role of the organic component in the uptake of iron(II) by manganese dioxide from seawater. Geochem. int. (a trans- lation of Geokhimiya), 22(3): 15-25.

Studies of Fe(II) uptake by birnessite (manganese dioxide), in the presence of sodium citrate, show that the main forms of Fe(II) in seawater (pH 8.0-8.2) containing organic matter are the aqua, sulfate and chloride ones. Uptake is controlled by the oxidation of Fe(II) to Fe(III), citrate concentration, and the formation of a mixed-ligand complex with the surface, among other processes. Results explain some aspects of iron distribution in the World Ocean in relation to organic matter abundance and dis- tribution. Geol. Inst., Acad. of Sci., Moscow, USSR. (msg)

D360. Books, collections (general)

86:1617 Aigner, Thomas, 1985. Lecture Notes in Earth

Sdeuces Iioi. 3: Storm D e p m i t i o ~ Systems. Dynamic stratigraphy in modern and ancient shallow-marine sequences. Springer-Verlag, Ber- lin; 174pp.

Detailed case studies are presented for modern storm depositional sequences on the nearshore skeletal banks of south Florida and on offshore shelf areas of German Bay in the North Sea, where processes leading to deposition and erosion are viewed in terms of barometric effects leading to raised water levels, wind effects producing onshore drift currents and offshore return flows, and wave effects setting up oscillatory bottom flows and superimposed unidirectional flows. Long-term storm responses are then revealed by a basin-wide analysis