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Basins having Middle Cretaceous source rocks

Basin or Province Structural Form Source Rock Dominant Kerogen Type Main Reservoirs Principal Maturation Stage Reference

Arabian-Iranian

Linear sag

Kazhdumi fm, marine sh & lmst

II

Asmari lmst (Miocene)?; Bergen delta (Early-M Cret)

M-Late Tert

Hull & Warman, 1970; James & Wynd, 1965; Dunnington, 1958, 1967; Ala et al., 1980; Murris, 1980; Koop & Stoneley, 1982

Maracaibo

Linear sag

La Luna fm, marine sh & lmst

II

Eocene-Miocene ss

Late Tert

Zambrano et al., 1972; Braser & White, 1984

East Venezuela, Middle Magdalena, Llanos Oriente

Linear sag

Querecual & La Luna fm, marine sh & lmst

II

Eocene-Miocene ss

Late Tert

Hedberg, 1950; Krause, 1988; McCollough & Padfield, 1985; Zumberge, 1984

Alberta, Overthrust, Green River

Foredeep

Mannville fm, marine sh & equiv

III

Cret ss

Late Tert

Parsons, 1973; Moshier & Waples, 1985

Gulf Coast

Circular sag

Marine sh

II

Cret carb & ss

Late Tert

Rainwater, 1971; Holcomb, 1971

Amu Darya, North Caucasus, Crimea

Linear sag

Aptian-Albian marine sh

II

Cret ss

Late Tert

Arkhipov et al., 1979; Mirzoyev & Dzhaparidze, 1979; Shestopal, 1979; Maksimov et al., 1987

South Atlantic basins

Rift/linear sag

U Neocomian-Aptian lacustrine & marine sh; Turonian marine sh

I, II

Cret ss & carb; Tert ss

Late Cret-Early Tert

Ponte et al., 1980; Clifford, 1986; Lehner & DeRuiter, 1977

West Siberia (northern)

Circular sag

Pokur fm (Albian-Cenomanian), continental clastics

III, coal

Albian-Cenomanian ss

Immature

Nesterov et al., 1978; Rice & Claypool, 1981; Kortsenshteyn, 1970; Grace & Hart, 1986

North Slope

Foredeep

HRZ sh, Hue sh, marine sh

III

Cret ss

Late Cret-Early Tert

Carman & Hardwick, 1983; Molenaar et al., 1987; Bird & Magoon, 1987

Songliao

Linear sag

Qingshankou & Nenjiang fm, deep lacustrine sh

I

Cret deltaic ss

Late Cret-Early Tert

Yang et al., 1985; Zhou, 1985; Yang, 1985