Mineral Resources On-Line Spatial Data
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Geologic units containing 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
- Early Proterozoic metamorphic rocks (Early Proterozoic)
- Undivided metasedimentary, metavolcanic, and gneissic rocks. (1600-1800 Ma)
- 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.
- May Creek Schist (Paleozoic) (Paleozoic(?) to Jurassic)
- Layered amphibolite, schist, gneiss, and quartzite. Protolith considered to be of Paleozoic age