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Nama Group information


Nama Group
Stratigraphic range: Ediacaran
~570–543 Ma
PreꞒ
O
S
D
C
P
T
J
K
Pg
N
TypeGroup
Unit ofNama Basin
Sub-unitsSee text
UnderliesTable Mountain Sandstone
OverliesBasement
Area125,000 km2 (48,000 sq mi)
Lithology
PrimarySandstone
OtherSiltstone, mudstone, limestone
Location
Coordinates23°54′S 16°42′E / 23.9°S 16.7°E / -23.9; 16.7
Approximate paleocoordinates41°24′S 179°12′W / 41.4°S 179.2°W / -41.4; -179.2
RegionOmaheke, Hardap & ǁKaras Regions
CountryNama Group Namibia

Geologic map of Namibia with the Nama Group in beige

The Nama Group is a 125,000 square kilometres (48,000 sq mi) megaregional Vendian to Cambrian group of stratigraphic sequences deposited in the Nama foreland basin in central and southern Namibia. The Nama Basin is a peripheral foreland basin, and the Nama Group was deposited in two early basins, the Zaris and Witputs, to the north, while the South African Vanrhynsdorp Group was deposited in the southern third.[1] The Nama Group is made of fluvial and shallow-water marine sediments, both siliciclastic and carbonate.[2] La Tinta Group in Argentina is considered equivalent to Nama Group.[3]

  1. ^ Gresse, P. G., G. J. B. Germs. The Nama foreland basin: sedimentation, major unconformity bounded sequences and multisided active margin advance. 1993, Precambrian Research, 63(3-4):247-252, 259-272
  2. ^ Saylor, Beverly Z., John P. Grotzinger, Gerard J. B. Germs. Sequence stratigraphy and sedimentology of the Neoproterozoic Kuibis and Schwarzrand Subgroups (Nama Group), southwestern Namibia. 1995 Precambrian Research 73:153-171.
  3. ^ Iacumin, M.; Piccirillo, E.M.; Girardi, V.A.V.; Teixeira, W.; Bellieni, G.; Echeveste, H.; Fernández, R.; Pinese, J.P.P.; Ribot, A. (2001). "Early proterozoic calc-alkaline and middle proterozoic tholeiitic Dyke Swarms from Central–Eastern Argentina: petrology, geochemistry, Sr–Nd isotopes and tectonic implications". Journal of Petrology. 42 (11): 2109–2143. doi:10.1093/petrology/42.11.2109.

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one specimen 5 cm long from the Nama Group, a Vendian to Cambrian group of stratigraphic sequences deposited in the Nama foreland basin in central and southern...

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reef distribution in a carbonate ramp system (terminal Proterozoic, Nama Group, Namibia)" (PDF). AAPG Bulletin. 89 (10): 1293–1318. doi:10.1306/06160505005...

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