Table 1.

Isotopic composition of various carbonate components in the Upper Sarvak Formation

Sample no.Mineralogy13CVPDB(‰)18OVPDB (‰)Notes
8952.8 shellCalcite2.0−3.6Rudist shell
91-shellCalcite1.9−3.6Rudist shell
92-shellCalcite1.9−3.3Rudist shell
98-shellCalcite1.8−3.0Rudist shell
BH-101Calcite0.9−5.2Rudist shell
BH104-3Calcite1.9−3.7Rudist shell
BH104-4Calcite2.0−3.2Rudist shell
BH-4 shellCalcite2.1−4.1Rudist shell
SE-21Calcitic soil−3.0−4.2Palaeosol
SE-22Calcitic soil−1.6−4.5Palaeosol
SK-1Calcitic soil−3.5−6.1Palaeosol
SK-2Calcitic soil−3.0−5.8Palaeosol
R2525-MCalcite2.8−3.4Matrix
R2517-MCalcite2.4−5.2Matrix
BH-6-MCalcite1.5−4.2Matrix
BH-3-MCalcite2.6−5.2Matrix
BH-2-MCalcite2.4−4.8Matrix
BH-12-MCalcite2.5−4.6Matrix
BH-107Calcite0.8−6.2Matrix
BH-106-MCalcite2.9−5.3Matrix
BH-104-MCalcite2.2−5.2Matrix
BH-0-MCalcite2.5−4.4Matrix
9211.5-MCalcite1.2−4.2Matrix
8961-MCalcite1.9−3.6Matrix
8943-MCalcite1.4−3.1Matrix
8700-MCalcite1.0−3.6Matrix
8688-MCalcite1.6−3.1Matrix
8686-MCalcite1.8−2.7Matrix
166-MCalcite−0.2−3.3Matrix
165-MCalcite0.1−2.0Matrix
164-MCalcite1.5−2.2Matrix
162-MCalcite1.6−3.8Matrix
161-MCalcite2.2−2.3Matrix
159-MCalcite1.7−2.6Matrix
151-MCalcite0.0−3.1Matrix
150-MCalcite1.9−1.0Matrix
143-MCalcite2.1−0.8Matrix
139-MCalcite2.4−1.6Matrix
129-MCalcite2.4−3.5Matrix
128-MCalcite2.6−3.8Matrix
120-MCalcite2.4−1.1Matrix
R2517-CCalcite2.4−4.8Early cement
BH-4-C1 RCalcite1.8−6.2Early cement
BH-2-C1Calcite1.5−5.9Early cement
BH-2-CCalcite2.5−4.9Early cement
BH-12-2Calcite2.0−6.3Early cement
BH104-C1Calcite0.7−5.6Early cement
BH104-5Calcite2.0−5.7Early cement
BH101-1Calcite1.2−4.1Early cement
BH-0-1Calcite2.2−6.6Early cement
9211.5-CCalcite2.2−2.1Early cement
8961-CCalcite2.1−4.9Early cement
8943-C1Calcite0.4−3.9Early cement
8943.5-C1Calcite0.2−3.4Early cement
8688-CCalcite0.3−3.4Early cement
166-CCalcite0.1−6.2Early cement
165-CCalcite0.0−4.4Early cement
160-CCalcite1.4−1.7Early cement
159-CCalcite3.1−3.9Early cement
158-CCalcite3.3−3.7Early cement
155-CCalcite0.6−2.2Early cement
153-CCalcite0.6−2.1Early cement
147-CCalcite1.7−3.1Early cement
143-CCalcite2.8−3.2Early cement
140-CCalcite2.9−2.8Early cement
129-CCalcite2.8−3.3Early cement
128-CCalcite3.4−5.2Early cement
120-CCalcite2.4−3.1Early cement
8688-C3Calcite1.6−4.4Late cement
8951-C2Calcite1.6−5.7Late cement
8952.8 C2Calcite1.3−5.4Late cement
BH-104-C3Calcite1.6−5.9Late cement
BH-2-C2Calcite2.4−5.6Late cement
BH-4-C2 RCalcite2.0−6.6Late cement
165-C2Calcite0.4−8.0Late cement
BH-106-C2Calcite2.4−10.2Late cement
BH106-CRCalcite0.8−9.2Late cement
BH106-CCalcite1.3−12.3Late cement
BH104-C2Calcite1.7−5.2Late cement