|Name||Allingtown Metavolcanics plus Maltby Lakes Metavolcanics|
|Geologic age||Middle? Ordovician|
Metamorphic > Metaigneous > GreenstoneAllingtown Metavolcanics - Green, fine-grained, massive greenstone, composed of epidote, actinolite, albite, and chlorite, commonly with abundant megacrysts of saussurite. Maltby Lakes Metavolcanics - Green to gray-green, fine-grained, massive to well-foliated and layered greenstone.
Metamorphic > Metasedimentary > Metaclastic > PhylliteAllingtown Metavolcanics - interlayered with minor green phyllite, generally containing quartz and sericite.
Metamorphic > SchistMaltby Lakes Metavolcanics - greenschist, and schist.
Metamorphic > AmphiboliteMaltby Lakes Metavolcanics - dark amphibolite to west and southwest.
|Comments||Part of Central Lowlands; Iapetus (Oceanic) Terrane - Connecticut Valley Synclinorium; Units are described seperately on printed map; combined in digital map.|
Rodgers, John, compiler, 1985, Bedrock Geological Map of Connecticut: Connecticut Geological and Natural History Survey, Hartford, Connecticut, 2 sheets, scale 1:125,000.
|Counties||Fairfield - New Haven|