Results 141 to 150 of about 798 (185)

Lithostratigraphy of the Mesoproterozoic Wilgenhoutsdrif Group

South African Journal of Geology, 2017
The Mesoproterozoic metamorphic formations of the Wilgenhoutsdrif Group underlie a large area around the Orange River east of Upington. The quartzitic Grootdrink Formation occurs at the base of the sequence and contacts with older units are either unconformable or along thrusts.
H.F.G. Moen, D.H. Cornell
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Marine Jurassic lithostratigraphy of Thailand

Journal of Southeast Asian Earth Sciences, 1996
Abstract Marine Jurassic rocks of Thailand are well-exposed in the Mae Sot and Umphang areas and less extensively near Mae Hong Son, Kanchanaburi, Chumphon and Nakhon Si Thammarat, in the north, west, and south respectively. They are generally underlain unconformably by Triassic and overlain by Quaternary strata.
A. Meesook, J.A. Grant-Mackie
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Lithostratigraphy of Nigeria — An Overview

World Environmental and Water Resources Congress 2009, 2009
Nigeria lies very close to the equator (hot country) West coast Africa between latitude 4° N and 14° N degree and longitude 2° E and 15° E degree. The country is located at the Northern end of Eastern branch of west coast of Africa rift system. Nigeria geological set up comprises broadly sedimentary formation and crystalline basement complex, which ...
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Lithostratigraphy of the Mesoproterozoic Garies Granite

South African Journal of Geology, 2016
The Garies Granite is a mesocratic to leucocratic, porphyritic post-tectonic member of the Spektakel Suite in the Mesoproterozoic Namaqua-Natal Belt of western Namaqualand. It is a composite unit, showing a continuum of rock types from mesocratic porphyritic biotite granite with characteristic slender phenocrysts (Rooiberg-type) to coarse-grained ...
C.H. de Beer, P.H. Macey
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Lithostratigraphy of the Mesoproterozoic Bethesda Formation

South African Journal of Geology, 2017
The metamorphic Bethesda Formation forms part of the Areachap Group, a volcano-sedimentary unit affected by the 1.2 to 1.0 Ga tectonothermal event in the Namaqua Sector of the Mesoproterozoic Namaqua-Natal Metamorphic Province. It comprises mainly pale brown biotite- and muscovite-rich metapelitic and quartzitic schist and gneiss with subordinate ...
H. Minnaar, D.H. Cornell, R.H. Bailie
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Lithostratigraphy of the Mesoproterozoic Jannelsepan Formation

South African Journal of Geology, 2017
The Jannelsepan Formation forms part of the 1.30 to 1.24 Ga Areachap Group. It is a pre-tectonic calc-alkaline volcano-sedimentary unit in the 1.2 to 1.0 Ga Namaqua Sector of the Namaqua-Natal Metamorphic Province. The main rock types are amphibolites with subordinate clinopyroxene or biotite.
H. Minnaar, D.H. Cornell, R.H. Bailie
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We and Lithostratigraphy

Vijesti Hrvatskoga geološkog društva, 1999
O litostratigrafskim se jedinicama u nas govori doslovno desetljećima! Stariji se svakako sjećaju da je 70-tih godina postojala i Sekcija za stratigrafiju HGD, a i kasnije postojali su pokušaji ustanovljavanja tijela unutar HGD koje bi imalo za cilj uspostavljanje reda u našoj litostratigrafskoj nomenklaturi.
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The Fate of Formal Lithostratigraphy

2014
Hollis D. Hedberg, the first chairman of the International Subcommission on Stratigraphic Classification (ISSC), compiled and published the International Stratigraphic Guide (ISG) in 1976 after a long and successful endeavour. The guide contains definitions, procedures, terminology, and nomenclature, with detailed information on three stratigraphic ...
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Tertiary Lithostratigraphy of Niger Delta

AAPG Bulletin, 1978
Abstract The composite Tertiary sequence of the Niger delta consists, in ascending order, of the Akata, Agbada, and Benin Formations. They compose an estimated 28,000 ft (8,535 m) of section at the approximate depocenter in the central part of the delta. The stratigraphic distribution of these rocks is poorly understood because of the
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Lithostratigraphy: Formation of the Formation

Newsletters on Stratigraphy, 2023
Brian R. Pratt, Stanley C. Finney, R. Michael Easton, Werner E. Piller   +3 more
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