Kajrahat Limestone

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Journal Article
Journal: Geology
Published: 01 February 2002
Geology (2002) 30 (2): 131–134.
... and carbonaceous megafossils. New U-Pb zircon and 87 Sr/ 86 Sr isotopic data from the Lower Vindhyan Supergroup require that the rocks are latest Paleoproterozoic to earliest Mesoproterozoic in age. Two rhyolitic volcanic horizons from the Deonar Formation, between the Kajrahat and Rohtasgarh Limestones and below...
Journal Article
Journal: GSA Bulletin
Published: 01 January 2011
GSA Bulletin (2011) 123 (1-2): 158–167.
... constrained by only a few radioisotopic dates. To help improve age constraints, single grains of glauconitic minerals taken from sandstone and limestone in two Proterozoic sequences in the Pranhita-Godavari Valley and the Chattisgarh basin were analyzed by the 40 Ar/ 39 Ar incremental heating method. Analysis...
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Figure 1. Generalized geologic map of Vindhyan Supergroup of east-central I...
in > Geology
Published: 01 February 2002
Figure 1. Generalized geologic map of Vindhyan Supergroup of east-central India (expanded area), showing sample locations, and typical stratigraphic section at southern margin of basin. In both, sample locations for U-Pb and Sr analyses are indicated: Deonar Formation (asterisk), Kajrahat
Figure 3.  87 Sr/ 86 Sr data for Precambrian marine carbonates plotted  aga...
in > Geology
Published: 01 February 2002
Sr/ 86 Sr during Precambrian. Lowest 87 Sr/ 86 Sr values of Vindhyan limestones are shown plotted against this curve. Age of 1700 Ma is assumed for Kajrahat Limestone, whereas 87 Sr/ 86 Sr ratios for Rohtasgarh Limestone and Bhander Limestone intersect seawater curve ca. 1200 Ma and ca. 750 Ma
Journal Article
Published: 01 May 2008
Petroleum Geoscience (2008) 14 (2): 197–204.
... in siltstone layers near the top of the Deonar Formation of the Semri group. The well ended in the Kajrahat limestone member of the Vindhyan super-group. Table 1 Stratigraphic succession in the eastern part of the Vindhyan Basin Super group Group Formation Vindhyan Bhander (Vendian Cambrian...
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Journal Article
Published: 02 October 2018
Canadian Journal of Earth Sciences (2019) 56 (3): 335–346.
... largely mimics the global pattern ( Fig. 8A ). Similar to the Paleoproterozoic and early Mesoproterozoic global values, the δ 13 C from the lower Vindhyans, which include the ∼1.72 Ga Kajrahat, Salkhan, and the ∼1.6 Ga Rohtasgarh limestones and their equivalents, fall within 0‰ ± 2‰. The late...
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Journal Article
Published: 09 September 2009
Geological Magazine (2010) 147 (2): 206–218.
... sampled for oxygen (δ 18 O) and carbon (δ 13 C) isotope analysis from these basins for assessing the extent of burial diagenesis. Pb–Pb dates of the limestones from the Kajrahat and Rohtas formations are 1721 ± 90 Ma ( Fig. 1 b; Sarangi, Gopalan & Kumar, 2004 ; Ray, 2006 ) and 1601 ± 130 Ma...
Series: Geological Society, London, Special Publications, Geological Society, London, Special Publications
Published: 01 January 2012
DOI: 10.1144/SP366.11
EISBN: 9781862396142
... Nearly horizontal to low-angle dipping over large areas Unproven; flaggy carbonates? Unknown Flaggy limestone Unknown Unknown Frontier basin; unknown Kurnool Two mega-sequences:Jamal and Kundair Gentle dips and broad north–south-trending folds Carbonaceous Owk shale Unproven Unproven...
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