Link to USGS home page
Coastal and Marine Geology Program
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-00-05
Core BH-00-05
[larger version 156K]
Location: Port Neches, Orange County, TX
  Latitude N30°01'02.92"
  Longitude W93°54'45.07"
  Water depth 0.87 m
  Length recovered 1.05 m
  Date obtained 06/16/2000
  Date described 08/15/00
0-15 cm Organic Mud Olive black (5Y 2/1)
Root mat: one large 1 cm vertical root almost fully intact, 20% 1-2 mm, 79% fibrous
Generally unconsolidated, becoming more compact with increasing % mud toward bottom of section

* gradational contact
15-19 cm Mud Grayish black (N2)
Roots: 5% 1mm, 95% fibrous

* gradational contact
19-21.5 cm Mud Pale olive (10Y6/2)
Roots: 5% less than or equal to 0.5mm, 95% fibrous (random)

* distinct contact
21.5-32 cm Mud Grayish black (N2)
Spongy texture at top, decreasing toward bottom of section
Med. light gray (N6) mottling toward bottom of section
Roots: fibrous

* gradational contact
32-42 cm Mud Mottled between med. light gray (N6) and med. dark gray (N4)
Primarily med. dark gray with distinct smaller areas of med. light gray
Roots: 5% less than or equal to 1 mm, 95% fibrous (random)

* distinct contact
42-48 cm Mud Med. light gray (N6) to light olive gray (5Y6/1)
Med. light gray grades into light olive gray downcore
44-45 cm - med. dark gray (N4) laminae
Load structure at bottom of section (or just drag?)

* distinct contact
48-66.5 cm Mud Dark gray (N3) with med. gray (N5)
Mottled throughout with areas of med. dark gray (N4) and light olive gray (5Y6/1)
Roots: less than or equal to 1 mm (random)

* gradational contact
66.5-84 cm Mud Dark gray (N3) with med. gray (N5)
Alternating dark and med. gray 1-2 mm laminae
Mottling within layers

*distinct contact
84-115 cm Organic Mud Brownish black (5YR2/1)
Spongy texture, 1% 1 mm, 99% fibrous

« Port Neches Core BH-00-04 | Port Neches Core BH-00-06 »

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


[an error occurred while processing this directive]