Table 1.

C- and O-isotope analyses for Deoban carbonates

Sample No.Description of sampleδ13C‰PDBδ18O‰SMOW
25. D25Light grey laminated dolomite (altitude 10 000 feet)1.119.1
24. D24Light grey laminated dolomite (altitude 10 000 feet)1.420.6
23. D23Light grey dolomite (altitude 9000 feet)1.120.9
22. D22Finely laminated calcareous silty layers4.329.4
21. D21Alternating thin dolomite and silty layers4.827.3
20. D20Light grey dolomite after 100 feet interval0.916.8
19. D19Light grey dolomite after 100 feet interval1.321.1
18. D18Light grey dolomite after 100 feet interval1.221.0
17. D17Light grey dolomite after 100 feet interval0.916.8
16. D16Light grey dolomite after 100 feet interval1.519.6
15. D15Light grey dolomite after 100 feet interval2.121.9
14. D14Light grey dolomite foot path to Deoban summit2.021.1
13. D13Dark bluish grey dolomite with elongated conical Georginia sp. and Conophyton sp. structures1.418.5
12. D12Dark bluish grey dolomite with Tungussia sp1.420.4
11. D11Dark bluish grey dolomite with Jurusania sp. and Minjaria sp. biostrome, 100 m below Deoban Forest Rest House (DFRH)2.022.6
10. D10Dark bluish grey dolomite with Jurusania sp. and Minjaria sp. biostrome, 100 m below DFRH−3.721.5
9. D9Dark black (organic) silty shale (similar to D8)0.318.9
8. D8Greyish black shale with Chuaria circularis megascopic acritarch between stromatlitic buildups, 500 m west of DFRH. Locality as D76.627.2
7. D7Dark bluish dolomite with Baicalia nova biostrome, 500 m west of DFRH (altitude 9232 feet)1.717.8
6. D6Light grey dolomite with Stratifera sp. 1 km from bifurcation3.022.7
5. D5Light grey dolomite with large Kussiella kussiensis biostrome and small Conophyton sp. biostrome, DFRH road, 100 m from bifurcation2.924.5
4. D4Oolitic-intraclastic, coated carbonate grains near bifurcation to Deoban Forest Rest House (DFRH) mule path, Deoban 3 km4.619.9
3. D3Dark bluish (organic) cherty laminated dolomite (microbiota-bearing), Chakrata–Deoban road, 1.3 km3.225.4
2. D2Dark bluish dolomite with chert lenses and layers (microbiota), Chakrata–Deoban road, 1.2 km1.817.3
1. D1Grey dolomite, lowermost Deoban road section 1 km near the contact with Chakrata slates (Damta Group)1.419.2