Hostname: page-component-78c5997874-g7gxr Total loading time: 0 Render date: 2024-11-06T01:15:08.015Z Has data issue: false hasContentIssue false
  • English
  • Français

Collapse Structures

Published online by Cambridge University Press:  01 May 2009

J. V. Harrison  and
N. L. Falcon
Get access Rights & Permissions [Opens in a new window]

Extract

RECENT reconnaissance surveys in south-west Persia have brought to our notice many examples of enigmatical structures preserved in massive limestones beautifully exposed in the naked mountains of that region. Application of many hypotheses involving faulting and thrusting proved impossible to satisfy the facts we had observed. We were at length forced to explain some of the structures we encountered as being produced by collapse of great sheets of limestone after removal of their original supporting cover accompanied by unsticking from their basement. Gravity alone provided the motive force. Simple folds, erosion, a shaly substratum, and gravity have induced massive beds of limestone to behave in an entirely unexpected manner. Examples are described below with sketches.

Type
Original Articles
Information
Geological Magazine , Volume 71 , Issue 12 , December 1934 , pp. 529 - 539
Copyright
Copyright © Cambridge University Press 1934

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

(1)Bain, G. W. “Flowage Folding,” Amer. Journ. Sci., xxii, 1931,503–530.Google Scholar
(2)Blackwelder, Eliot. Handbuch der Regionalen Geologie, viii, abt. 2, 1912, 80, fig. 9.Google Scholar
(3)Collingwood, W. Gershom. The Limestone Alps of Savoy, 1884, figs. viiia and b, x, xi, and xii.Google Scholar
(4)Daly, R. A.. Our Mobile Earth, 1926, 269, fig. 166.Google Scholar
(5)Douvillé, Robert. Handbuch der Regionalen Geologie, iii, abt. 3, 33, fig. 26.Google Scholar
(6)Haarmann, E. Die Oszillationstheorie, Eine Erklärung der Krusten-bewegungen von Erde und Mond, 1390.Google Scholar
(7)Harrison, J. V. “The Geology of Some Salt-Plugs in Laristan,” Quart. Journ. Geol. Soc., lxxxvi, 1930, 485, pl. lvi.Google Scholar
(8)Heim, Albert. Geologie der Schweiz, 1919, 582, and Taf. xxii, xxiii, xxiv.Google Scholar
(9)Jeffreys, H. “On the Mechanics of Mountains”: Geol. Mag., LXVIII, 1931, 435–442.CrossRefGoogle Scholar
(10)Longwell, C. R. “Review of Haarmann’s Oszillationstheorie,” Amer. Journ. Sci., xx, 1930, 217–220.CrossRefGoogle Scholar
(11)Park, J. Geology of New Zealand, 1910, 52, fig. 18.Google Scholar
(12)Rogers, A. W., and du Toit, A. L., The Geology of Cape Colony, 1909, 124, fig. 9.Google Scholar
(13)Sherrill, R. E.. “Symmetry of Northern Appalachian Foreland Folds,” Journ. Geol., xlii, 3, 1934, 225–247.CrossRefGoogle Scholar
(14)Stahl, A. V., Handbuch der Regionalen Geologie, v, abt. 5, 1924, Tafel iv and ix.Google Scholar
(15)Telfer, “Phosphate in the Canadian Rockies,” Bull. Can. Inst. Min. and Met., 1933, 579, fig. 5.Google Scholar
(16)Terra, H. de. “Structural Features in Gliding Strata,” Amer. Journ. Sci., xxi, 1931, 204–213.CrossRefGoogle Scholar