Rock bursts and associated neotectonic forms at Minnipa Hill, northwestern Eyre Peninsula, South Australia

University of Adelaide, Department of Geology and Geophysics, Adelaide, South Aust., Australia

Disturbance of the surface of Minnipa Hill Southeast, a low granite dome located on the northwestern Eyre Peninsula, on 19 January 1999, coincided with a shallow earth tremor, and it is suggested that the two events are causally related. The disturbance, which affected an area 170X100 m, took the form of rock bursts, reverse fault scarps, low angle planes of dislocation and overriding sheets, A-tents, dislocated slabs and blocks and widespread surficial flaking. Evidence of two earlier disturbances was noted. The event directly confirms the association of A-tents and dislocated slabs with compressive stress and by implication links bornhardts and sheet fractures with similar strain environments.

This record provided courtesy of AGI/GeoRef.

This article has been cited by other articles:

				C.R. Twidale "Canons" revisited and reviewed: Lester King's views of landscape evolution considered 50 years later GSA Bulletin, October 1, 2003; 115(10): 1155 - 1172. [Abstract] [Full Text] [PDF]

				C. R. Twidale, C.R. Twidale, and J.A. Bourne Active dislocations in granitic terrains of the Gawler and Yilgarn cratons, Australia, and some implications South African Journal of Geology, March 1, 2003; 106(1): 71 - 84. [Abstract] [Full Text] [PDF]