Geologic units containing calc-silicate schist

Earth material > Metamorphic rock > Schist

Calc-silicate schist

A metamorphosed calcareous rock, commonly derived from argillaceous limestone or calcareous mudstone, containing calcium-bearing silicates such as diopside and wollastonite, with a schistose structure produced by parallelism of platy minerals

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Arizona - Maryland - New Hampshire - Oregon

Arizona

Early Proterozoic metamorphic rocks (Early Proterozoic): Undivided metasedimentary, metavolcanic, and gneissic rocks. (1600-1800 Ma)

Maryland

Cockeysville Marble (Late Precambrian (?)): Cockeysville Marble - Metadolomite, calc-schist, and calcite marble are predominant; calc-gneiss and calc-silicate marble widespread but minor; thickness about 750 feet.

New Hampshire

Madrid and Smalls Falls Formations, undivided (Silurian): Madrid and Smalls Falls Formations, undivided.
Madrid Formation (Upper Silurian? ): Madrid Formation - Massive to weakly foliated, purple biotite-feldspar granofels, layered calc-silicate, and dark pelitic-sulfidic schist containing calc-silicate pods in upper member; an eastern facies equivalent to the upper part of the Fitch Formation. Locally mapped as the Warner Formation of Nielson (1981) in southern New Hampshire.

Oregon

May Creek Schist (Paleozoic) (Paleozoic(?) to Jurassic): Layered amphibolite, schist, gneiss, and quartzite. Protolith considered to be of Paleozoic age

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Page Last modified: 11:56 on 09-Apr-2013