The Niobrara Seaway

The Niobrara Seaway The World About 90 Million Years Ago

1 micron

We are here And seriously under water!

Niobrara Chalk, Marl & Shale Coccosphere/Coccoliths

Niobrara Play – Oil Production & Shows Area of Niobrara Carbonate Deposition (all benches)

Wyomin

g

Colorado

Niobrara – Organic Richness (TOC) Measured Total Organic Carbon (TOC)

Adjust to Original TOC

160 TOC from cuttings 1.5-2.0 wt%

TOC Cores TOC Cuttings

140

Sample Count

120

100

TOC from cores 2.5-3.0+ wt%

80

~5%

60

40

20

3% 0 0

1

2

3

4

TOC (wt%)

5

6

7

8

Cornford, 1994