Le Cretace superieur et le Paleogene dans la dorsale calcaire aux abords meridionaux de Tetouan (Rif septentrional, Maroc)

1964 ◽  
Vol S7-VI (3) ◽  
pp. 305-308
Author(s):  
Jean Claude Griffon ◽  
J. Magne ◽  
Jacques Sigal
Keyword(s):  
Lower Cretaceous ◽  
Upper Cretaceous ◽  
Upper Eocene ◽  
Tectonic Movements

Abstract The limestone dorsal of the northern part of the Rif mountains near Tetuan, Morocco, exposes Permian clastics, Triassic dolomite, Jurassic and lower Cretaceous limestone, upper Cretaceous to Eocene marl, transgressive upper Eocene conglomerate, and Oligocene flysch. The microfauna of the upper Cretaceous and the Paleogene formations are particularly useful in correlations. Major tectonic movements occurred in the Miocene.

Le Flysch gaditan au nord et au nord-est d'Algesiras (prov. de Cadix, Espagne)

1960 ◽  
Vol S7-II (3) ◽  
pp. 352-361
Author(s):  
Jean Didon
Keyword(s):  
Lower Cretaceous ◽  
Upper Cretaceous ◽  
Upper Eocene ◽  
The West ◽  
Upper Oligocene

Abstract Several allochthonous units were discovered during geologic reconnaissance in 1958-59 north and northeast of Algeciras, Spain. At the base is the Estepona Flysch, comprising upper Oligocene and Miocene deposits. Above this are the Algeciras unit, consisting of upper Eocene and Oligocene Flysch deposits, and the Camarote unit, composed of Tithonian (Jurassic) and lower Cretaceous sandy marls. At the top are the Aljibe sandstone on the west (Oligocene) and the Argueelles unit on the east (upper Cretaceous to middle Oligocene limestones). Most of these units originated in Ultrabetic regions.

scholarly journals V.—Note on an Undescribed Area of Lower Greensand or Vectian in Dorset

1891 ◽  
Vol 8 (10) ◽  
pp. 456-458 ◽  
Author(s):  
A. J. Jukes-Browne
Keyword(s):  
Lower Cretaceous ◽  
Small Area ◽  
Upper Cretaceous ◽  
The Other ◽  
Present Communication ◽  
The Subject ◽  
Geological Magazine

Until recently no outcrop of the Vectian or Lower Greensand was known to occur between Lulworth on the coast of Dorset and the neighbourhood of Devizes in Wiltshire. It was supposed that, with the exception of a small area of Wealden in the Vale of Wardour, the whole of the Lower Cretaceous Series in Dorset and South Wilts was concealed and buried beneath the overlapping Upper Cretaceous strata. A recent examination of this district however has revealed two areas where the Vectian sands emerge from beneath the Gault. One of these has already been indicated in the pages of the Geological Magazine; the other is the subject of the present communication.

GEOLOGY AND PETROLEUM PROSPECTS OF RUATORIA AREA, EAST COAST, NORTH ISLAND, NEW ZEALAND.

1972 ◽  
Vol 12 (1) ◽  
pp. 45
Author(s):  
A.C.M. Laing
Keyword(s):  
New Zealand ◽  
Upper Cretaceous ◽  
East Coast ◽  
Geological Mapping ◽  
Upper Eocene ◽  
Upper Miocene ◽  
Upper Oligocene ◽  
Potential Reservoir ◽  
Surface Geology ◽  
Shallow Structure

As measured in outcrop sections, more than 30,000 ft. (9,000 m.) of Upper Cretaceous and Tertiary marine sediments overlie basement of Lower Cretaceous age in the area. Mudstones, siltstones, and turbidites make up the majority of this sedimentary section but there are also 3,000 ft. (900 m.) of interbedded greywacke sandstones and siltstones of Maestrichtian age, and 400 ft. (120 m.) of interbedded limestone and greensands of Oligocene age. Both of these latter units are potential reservoir beds.The majority of the exploration work has been by surface geological mapping. A number of time-rock units have been used which were initially distinguished by fossils, but which could later be distinguished by lithological differences.Four regional unconformities, base of Upper Cretaceous, near top of Upper Cretaceous, Upper Oligocene, and Upper Miocene have been recognised in the stratigraphic section.A slump breccia of Upper Eocene age has also been mapped extending over an area 25 mi. (40Km) by 5 mi. (8Km) with a maximum thickness of 7500 ft. (2.25Km.) and contains large lumps of older rocks. The sediments of the Ruatoria area are folded into broad synclines and tight anticlines with average dips ranging from 50 degrees in the Upper Cretaceous to 15 degrees in the Upper Miocene. The trend of the folds is northeast in the southern part of the area and northwest in the northern part, the dividing line being the major northwest trending Hikurangi Fault.The area abounds in gas seepages some of which have been capped and exploited. There are records of oil seepages also. Within the 453 sq.mi. (1,178 sq. Km) only nine shallow holes have been drilled all of which recorded some oil or gas shows.Alliance Petroleum has located two wells on the flanks of closed structures outlined by surface geology and shallow structure drilling.

scholarly journals Cretaceous ammonites from Fuerteventura, Canary Islands

1992 ◽  
Vol 129 (6) ◽  
pp. 763-769 ◽  
Author(s):  
Otto Renz ◽  
Daniel Bernoulli ◽  
Lukas Hottinger
Keyword(s):  
Canary Islands ◽  
Deep Water ◽  
Lower Cretaceous ◽  
Upper Cretaceous ◽  
Basal Complex ◽  
Paper Document ◽  
Ocean Boundary

AbstractMesozoic deep-water sediments occurring on the island of Fuerteventura were deposited near the continent–ocean boundary adjacent to the African margin. During Tertiary times, they were uplifted and intruded by ultramafic, mafic and alkaline plutons and dykes and are now exposed as part of the ‘Basal Complex’ of the island. These sediments reflect more or less continuous hemipelagic and turbiditic deposition during most of Jurassic and Cretaceous times. Two ammonites, described in this paper, document a Valanginian to Hauterivian age for part of the Lower Cretaceous siliciclastic turbidites, and a latest Albian to early Cenomanian age for part of the Upper Cretaceous hemipelagic limestones.

Review of the bivalve genus Plicatula from Cretaceous and lower Cenozoic strata of California and Baja California

1997 ◽  
Vol 71 (2) ◽  
pp. 287-298 ◽  
Author(s):  
Richard L. Squires ◽  
Louella R. Saul
Keyword(s):  
New Species ◽  
Los Angeles ◽  
Lower Cretaceous ◽  
Southern California ◽  
Upper Cretaceous ◽  
Baja California ◽  
Middle Eocene ◽  
Baja California Sur ◽  
Northern California ◽  
Three New Species

The Cretaceous and early Cenozoic species of the shallow-marine, warm-water bivalve Plicatula from California (United States) and Baja California (Mexico) are reviewed, and three new species are named. All of these species are representatives of Plicatula and not of the closely related taxon Harpax, which is associated with high-latitude and cool-water regions. The earliestknown Cretaceous species of Plicatula from the study area is P. variata Gabb, 1864, from Lower Cretaceous (Hauterivian Stage) strata in northern California, and our studies show it to be conspecific with Plicatula onoensis Anderson, 1958.Plicatula allisoni new species is from Lower Cretaceous (Albian Stage) strata in Baja California, Mexico. Plicatula modjeskaensis new species is from Upper Cretaceous (Turonian Stage) strata in the Santa Ana Mountains, southern California. A possible new species from the same strata is also mentioned. A poorly preserved specimen of Plicatula? sp. is known from Upper Cretaceous (upper Campanian to lower Maastrichtian) strata in northern California.The only Paleocene species of Plicatula from the study area is P. ostreiformis Stanton, 1896, from lower Paleocene strata of Lake County, northern California, and our studies show it to be conspecific with Ostrea buwaldana Dickerson, 1914. The only previously described Eocene species of Plicatula from the study area is P. juncalensis Squires, 1987, from lower middle Eocene (“Capay Stage”) strata of Los Angeles County, southern California. Plicatula surensis new species is from middle lower Eocene (“Capay Stage”) strata in Baja California Sur, Mexico. In addition, there is a Plicatula? sp. from Eocene strata of Baja California Sur, Mexico.Although Plicatula is of uncommon occurrence north of Baja California, its thermophilic trait makes it useful in recognizing periods of warm climate.

The Madai-Baturong Limestone Member of the Chert-Spilite Formation, North Borneo

1962 ◽  
Vol 99 (4) ◽  
pp. 289-303 ◽  
Author(s):  
C. G. Adams ◽  
H. J. C. Kirk
Keyword(s):  
Lower Cretaceous ◽  
Upper Cretaceous ◽  
Regional Structure ◽  
Thrust Faulting ◽  
South Eastern ◽  
North Borneo ◽  
The World ◽  
Neogene Sediments

AbstractPelagic Foraminifera found in the marginal parts of the limestone at Mount Madai in south-eastern North Borneo indicate that it is of Upper Cretaceous age. Much of the limestone at Mount Madai and Mount Baturong does, however, contain algae and other microfossils characteristic of Lower Cretaceous rocks in other parts of the world.The limestone is provisionally classified as the Madai–Baturong Limestone Member of the Chert-Spilite Formation. Revision of the stratigraphy has clarified the regional structure, and it is postulated that the Chert-Spilite Formation has been uplifted against Neogene sediments along a major zone of thrust faulting.

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