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Coastal & Marine Geology Program >Subsidence and Fault Activation . . . > Open File Report 01-274

Shallow Stratigraphic Evidence of Subsidence and Faulting Induced by Hydrocarbon Production in Coastal Southeast Texas

USGS Open File Report 01-274

Robert A. Morton, Noreen A. Purcell, and Russell L. Peterson

Contents:
Summary
Introduction
Geology & Production Histories
Sediment-Surface Profiles
Sediment Cores
Results
Coastal Environmental Implications
References
Appendix A
Appendix B
Project Contact:
Bob Morton

Appendix B: Core Descriptions

Appendix B: Core Descriptions
Port Neches Cores - BH-00-01 |BH-00-02 |BH-00-03 |BH-00-04 |BH-00-05 |BH-00-06
Caplen Field Cores - COF-00-01 |COF-00-02 |COF-00-03 |COF-00-04

Core BH-00-06
Core BH-00-06
[larger image 148K]
Location: Port Neches, Orange County, TX
  Latitude N30°00'50.79"
  Longitude W93°54'46.69"
  Water depth 0.53 m
  Length recovered 0.77 m
  Date obtained 06/16/2000
  Date described 08/18/00
0-12 cm Organic Mud Brownish black (5YR2/1)
Root mat: 10% 1.5-2 cm, 20% 1-2 mm, 70% <1mm-fibrous
8-12cm - right side of core differs from above and has less than or equal to 0.5mm-fibrous roots and spongy texture (which grades into section below)

* gradational contact
12-41 cm Mud Med. light gray (N6) and med. dark gray (N4)
Abundant mottling but decreasing with depth
51-52 cm mottling resembles laminations
Roots: <1 mm (random)
64-65 cm oxidized organic lens
grayish green (10GY 5/2) (v. small pelletlike)
70-77cm color changes gradually to a darker shade of olive gray (5Y4/1) Ð more uniform brown color, 1-2 mm roots (v. random)
41-77cm Mud Pale olive (10Y6/2)
Roots: 5% less than or equal to 0.5mm, 95% fibrous (random)

* distinct contact

« Port Neches Core BH-00-05 | Caplen Field Core COF-00-01 »

Coastal & Marine Geology Program >Subsidence and Fault Activation . . . > Open File Report 01-274


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