geodil.jpg

A Geoscience Digital Image Library

3079.jpg
TitleFold below an unconformity
DescriptionFold below an unconformity. This is a vertical photo of low tide exposures. Cretaceous sandstones and conglomerates at the upper left dip in that direction at about 20 degrees. The bulk of the photo comprises the Ordovician Greenland Group graywackes with nearly vertically plunging axes. The beds were cleaved in a mid-Paleozoic deformation and then upended by a probably Cretaceous core-complex event. This second deformation reactivated the older cleavages, utilizing many of them for flexural slip folding. Twelve Mile Area tidal platform norht of Greymount, West Coast of South Island, New Zealand.
ChronostratigraphyOrdovician
Geologic provinceGreenland Group
LocationNew Zealand. Near Greymount. Twelve Mile Area tidal platform, West Coast of South Island.
PhotographerDonald Wise. 1995.
CollectionKeck Structural Geology Slide Set #DW5.
Key wordsNew Zealand, fold, uncomformity
Tech details416 KB. Vista.
GeoDIL number3079
CopyrightDonald Wise