A general term for any nonsorted or poorly sorted, noncalcareous, terrigenous sedimentary rock (e.g., pebbly mudstone) containing a wide range of particle sizes.
   Compare: diamicton.

Glossary of landform and geologic terms. 2013.

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  • Diamictite — from Stolpe, eastern Germany Snowball Earth type diamictit …   Wikipedia

  • diamictite — noun A sedimentary, calcareous conglomerate containing a mixture of particles; mixtite …   Wiktionary

  • Geology of Tasmania — Tasmania has a varied geological history, with the world s biggest exposure of diabase, or dolerite. Rocks from the Neoproterozoic, Paleozoic and Mesozoic time periods appear. It is one of the few southern hemisphere areas glaciated during the… …   Wikipedia

  • Marinoan glaciation — Neoproterozoic Snowball Periods 1000  – …   Wikipedia

  • Snowball Earth — The Snowball Earth hypothesis as it was originally proposedcite book author = Kirschvink, J.L. year = 1992 chapter = Late Proterozoic low latitude global glaciation: The snowball Earth title = The Proterozoic Biosphere: A Multidisciplinary Study… …   Wikipedia

  • Till — is unsorted glacial sediment. Glacial drift is a general term for the coarsely graded and extremely heterogeneous sediments of glacial origin. Glacial till is that part of glacial drift which was deposited directly by the glacier. It may vary… …   Wikipedia

  • List of rock types — This page is intended as a list of all rock types. NOTOC A : Amphibolite: Andesite: Anorthosite : Anthracite: Aplite: Argillite: Arkose B : Banded iron formation: Basalt: Basanite: Blueschist: Boninite: Breccia C : Carbonatite: Cataclasite: Chalk …   Wikipedia

  • Congo craton — Approximate location of Mesoproterozoic (older than 1.3 Ga) cratons in South America and Africa. The Congo craton, covered by the Palaeozoic to recent Congo basin, is an ancient Precambrian craton that with four others (the Kaapvaal,… …   Wikipedia

  • Diamicton — In geology, diamicton (also diamict) is a very poorly sorted sediment. Large sedimentary grains gravel size and larger (>= 2 mm) are set in a matrix of fine grains. The term diamicton is a nongenetic term, although a common origin for… …   Wikipedia

  • Superior craton — in the west. The western margin extends from northern Minnesota through eastern Manitoba to northwestern Ontario.The formation of the Superior craton is best explained within the context of 2.72 2.68 Ga accretion of small continental plates and… …   Wikipedia