Bradley B Sageman

Earth & Environmental Sciences

1. Cretaceous 100%
2. Turonian 84%
3. basin 62%
4. isotope 55%
5. carbon isotope 44%
6. black shale 42%
7. organic carbon 42%
8. ocean 37%
9. Cenomanian-Turonian boundary 37%
10. volcanism 36%
11. limestone 35%
12. timescale 35%
13. shale 32%
14. carbonate 31%
15. chemostratigraphy 29%
16. anoxia 29%
17. sea level 29%
18. climate 28%
19. creek 27%
20. Santonian 27%
21. North America 26%
22. water column 24%
23. stratigraphy 24%
24. osmium isotope 23%
25. obliquity 23%
26. oxygen 23%
27. organic matter 22%
28. Coniacian 22%
29. oxygenation 22%
30. biofacies 22%
31. large igneous province 20%
32. nutrient 20%
33. perturbation 20%
34. carbon cycle 18%
35. Campanian 17%
36. fossil 17%
37. sediment 17%
38. eccentricity 16%
39. mass extinction 16%
40. productivity 16%
41. carbon 16%
42. orbital forcing 15%
43. geological record 15%
44. cyclostratigraphy 14%
45. Laramide orogeny 14%
46. fractionation 14%
47. seawater 14%
48. bottom water 14%