SHELL REPORT: SAND FACIES AND THEIR ENVIRONMENTS IN NW GULF OF MEXICO
H. A. BERNARD, C. F. MAJOR, and B. S. PARROTT
Search and Discovery Article #60002 (1999)
GEOLOGICAL MISCELLANEOUS- 16; HOUSTON, TEXAS,
SEPTEMBER 1958
PROPERTY OF SHELL DEVELOPMENT COMPANY. The information contained herein is considered confidential by Shell Development Company. Exportation of this document is subject to license under the Export Control Act of 1949.
TABLE OF CONTENTSIllustrations
Abstract
Introduction
Classification of Environments of the Northwestern Gulf of
Mexico
Continental Environments
Transitional Environments
Normal Marine Environments
Alluvial Environments
Meander Belt
Point Bar
Sequence
in Grain Size
SP
Character
Sequence
in Sedimentary Features
Small
Ripple Bedded Features
Horizontally
Bedded Features
Giant
Ripple Bedded Features
Poorly
Bedded Features
Gradational
Zonation in Sequence of Sedimentary Features
Miscellaneous
Sedimentary Features
Organic
Remains
Directional
Features
Cross
Bedding
Grain
Orientation
Geometry,
Size, and Prediction in Trend
Abandoned Channels
Flood Basin or Backswamp
Deltaic Environments
Classification of Deltas
Genesis of a Delta
Deltaic Subenvironments and the
Mississippi Delta
Deltaic Plain
Pro Deltaic Plain
Pro Deltaic Plain Fringe
Pro Deltaic Plain Distal
Deltaic Foraminiferal Assemblages
Generalized Deltaic Sediment
Distribution
Deltaic Plain
Pro Deltaic Plain
Sedimentary Features Common to Deltaic
Deposits
Deltaic Plain
Distributary
Channel Fill and Natural Levee
Point
Bar
Flood
Basin
Pro Deltaic Plain
Fringe
Distal
Other Features in the
Mississippi Deltaic Area
Geometry and Sequence of Sedimentary
Features
Mississippi-St.
Bernard Subdelta
Pleistocene
Mississippi-Neptune Delta
Sequence of Fringe
Deposits and SP Log Character
Sequence of Channel
Fill Deposits and SP Log Character
Sequence of Deltaic
Point Bar and Other Deposits
Bar Finger
"Sands" of Fisk
Brazos and Rio Grande Deltas
Pro Deltaic Plain
Sequence
and SP Log Character
Deltaic Plain
Meander
Belt
Flood
Basin
Wood
and Fauna
Sequences
and SP Log Character
Interdeltaic-Marine and Marine Environments
Galveston Barrier Island and Associated
Environments
Genesis
Bottom Sediments
Sedimentary Features
Sequence
SP Log Character
Foraminiferal
Assemblages
Directional Features
Geometry
Transgressive Beach and Associated
Regressive Mud Flat
Environment
Genesis, Geometry,
and Nature
Directional Features
Marine Environments and Shelf Sands
Summary
Bibliography
LIST OF ILLUSTRATIONS
Figure
- Occurrence of Recent depositional environments in the northwestern Gulf of Mexico.
- Classification of depositional environments of the northwestern Gulf of Mexico.
- Recent alluvial valley of the Brazos River near Richmond, Texas.
- Brazos meander belt near Richmond, Texas.
- Alluvial valley environments.
Cross
section
of Brazos point bar deposits near Richmond, Texas.
Cross
sections of small-scale ripple bedded, point bar sands.
- Horizontally bedded point bar sands.
- Giant ripples and giant ripple bedded point bar sands.
- Giant ripple bedded sands.
- Poorly bedded, point bar gravel and coarse sand.
- Sequence of bedding features found in point bar deposits.
- Miscellaneous sedimentary features of point bar deposits.
- Giant ripple foreset directions in Brazos point bar deposits.
- Dip directions of foreset beds in zone of giant ripple bedded sands of a Brazos point bar.
- Expected
cross
bedding directions of giant ripple bedded sands of Mississippi point bars.
- Grain orientation in horizontally bedded sands of a point bar deposit.
- Grain orientation in horizontally bedded and small ripple bedded deposits of a point bar deposit.
- Comparison of Mississippi and Brazos point bar deposits.
- Typical world deltas.
- Typical world deltas.
- Block diagrams illustrating the development of Mississippi subdeltas.
- Mississippi deltaic environments.
- Distribution of foraminiferal biofacies in the Mississippi Delta Area.
- Bottom sediment distribution, vicinity of Mississippi Delta.
- Distribution of Mississippi deltaic deposits characterized by sedimentary features.
- Marsh and shallow fringe deposits of the Mississippi Delta.
- Deep fringe and distal pro deltaic plain deposits.
Cross
section
of St. Bernard-Mississippi Delta.
- Fence diagram of a Pleistocene Mississippi Delta.
Cross
sections of LaFourche-Mississippi Delta.
- Sedimentary framework, modern Mississippi Delta.
- Brazos River Delta.
- Representative
section
of modern deltaic deposits of the Brazos River.
- Fence diagram of the Rio Grande Delta. .
- Representative
section
of point bar deposits of the Rio Grande Delta.
- Late Quaternary geology and facies of southeast Texas.
- Galveston Island beach accretions.
- Bottom sediments in vicinity of Galveston Island.
- Sedimentary features of deposits in vicinity of barrier islands.
Cross
sections of barrier island deposits.
- Representative
section
of Galveston barrier island deposits.
- SP character of principal sand facies of Recent depositional environments.
- Foraminiferal assemblages in the vicinity of Galveston Island.
- Grain orientation in Galveston barrier island deposits.
- Block diagram of Galveston barrier island deposits.
- Chenier plain of southwestern Louisiana showing beaches and mud flats.
- Chenier plain
cross
sections of transgressive beach and regressive mud flat deposits.
- Grain orientation in cheniers or abandoned beach ridges.
- Bottom sediment distribution on continental shelf off Louisiana and southeast Texas.
- Representative
section
of marine shelf sands off southwest Louisiana and southeast Texas.
- Trends of Recent and late Pleistocene sand bodies of coastal Louisiana and Texas.