About This Item
- Full TextFull Text(subscription required)
- Pay-Per-View PurchasePay-Per-View
Purchase Options Explain
Share This Item
The AAPG/Datapages Combined Publications Database
Journal of Sedimentary Research (SEPM)
Abstract
Evaporite Solution Breccias from the Mississippian of Southwest Montana
Gerard V. Middleton
ABSTRACT
Zones of breccia within the Madison Group of southwest Montana consist of very poorly sorted angular fragments of calcilutite or silty limestone, which are set in a fine grained matrix of crushed "rock-flour" and cemented by calcite. In places where the matrix was silty or sandy it weathers yellow-brown and contains abundant authigenic quartz crystals. The breccias are confined stratigraphically to zones which may be correlated with evaporites in subsurface sections. The upper contacts of the breccia zones are indistinct but the lower contacts are well defined; in some localities, brecciation occurred in place with little displacement of the fragments.
The brecciation resulted from the collapse and crushing of non-soluble strata after the solution by ground water of beds of evaporite.
Pay-Per-View Purchase Options
The article is available through a document delivery service. Explain these Purchase Options.
Watermarked PDF Document: $14 | |
Open PDF Document: $24 |