Home | Site Map | What's New | Image Index | Copyright | Posters | ScienceViews | Science Fiction Timelines |

PHOTO INDEX OF
PRIMARY TARGETS
ASTEROIDS
COMETS
EARTH
JUPITER
KUIPER BELT
MARS
MERCURY
METEORITES
NEPTUNE
OORT CLOUD
PLUTO
SATURN
SOLAR SYSTEM
SPACE
SUN
URANUS
VENUS
ORDER PRINTS

OTHER PHOTO INDEXES
ALL TARGETS
PHOTO CATEGORIES

SCIENCEVIEWS
AMERICAN INDIAN
AMPHIBIANS
BIRDS
BUGS
FINE ART
FOSSILS
THE ISLANDS
HISTORICAL PHOTOS
MAMMALS
OTHER
PARKS
PLANTS
RELIGIOUS
REPTILES
SCIENCEVIEWS PRINTS

Anticlines and salt domes, Gulf coast, Iran

Target Name:  Earth
Spacecraft:  Space Shuttle
Produced by:  NASA
Copyright: Image Copyright Free; Caption LPI
Cross Reference:  STS066-154-19
Date Released: 1994-11-07

Related Document
Download Options

NameTypeWidth x HeightSize
anticlin.jpgJPEG640 x 50464K
anticlin.jpgJPEG1218 x 960425K

One of the most spectacular examples of anticlinal fold structures lie on the north shore of the Strait of Homuz in the Persian Gulf. Located near the important city of Bandar Abbas, these folds form the foothills of the Zagros Mountains, which run north-northwesterly through Iran. The folds were formed when the Arabian shield collided with the western Asian continental mass about 4 to 10 million years ago. Subduction still continues slightly further east, beneath Baluchistan, but is inactive in the Gulf itself. Although not obvious in the photograph, the shortening expressed by the folds is accompanied by extensive thrusting on the easterly dipping planes. All the deformation is geologically young; the folded sediments are Paleogen and Neogen. Simple anticlinal structures are well know as classic traps for hydrocarbons, and some producing wells are located in the area.

The other features that are prominent in this photograph are the dark circular patches. These represent the surface expression of salt domes that have risen diapirically from the Cambrian Hormuz salt horizon through the younger sediments to reach the surface. Only in a hot arid environment such as that of the Gulf can the soluble salt escape rapid erosion. Salt domes also are frequently favorable sites for trapping hydrocarbons.

Copyright © 1995-2016 by Calvin J. Hamilton. All rights reserved.