State Route 57 zeolite occurrence (Georgetown locality; Connerie's store), Redding (Reading), Fairfield Co., Connecticut, USA
|Latitude & Longitude (WGS84):||41° 15' 10'' North , 73° 25' 35'' West|
|Latitude & Longitude (decimal):||41.25278,-73.42639|
|Köppen climate type:||Cfa : Humid subtropical climate|
According to a Hiller (1967), an occurrence apparently exposed in rock cuts SE of Caraluzzi's Market (Supermarket) at the SE intersection of state Route 57 and Old Mill Road. This is in the Redding portion of Georgetown village, which is mostly in Wilton. An old specimen label calls it the "Georgetown A&P". Zeolites and associates found in fractures in Ordovician Ratlum Mountain schist.
6 valid minerals.
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
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|Eifelian - Lochkovian|
387.7 - 419.2 Ma
|Ordovician? granitic gneiss|
Age: Devonian (387.7 - 419.2 Ma)
Description: (Including local terms Ansonia, Mine Hill, "Tyler Lake," "Siscowit") - White, light-gray, buff, or pink, generally foliated granitic gneiss, composed of sodic plagioclase, quartz, microcline, muscovite, and biotite, and locally garnet or sillimanite. Commonly contains numerous inclusions or layers of mica schist and gneiss.
Comments: Part of Central Lowlands; Iapetus (Oceanic) Terrane - Connecticut Valley Synclinorium; Ansonia Gneiss is here referred to as Ansonia leucogranite. On the basis of field and laboratory studies, Ansonia, Beardsley, Pumpkin Ground, and Shelton gneisses, previously considered stratigraphic units, are reinterpreted as plutonic. Ansonia is described as a strongly lineated and moderately foliated, fine-grained, garnet-bearing, biotite-muscovite leucogranite with a well-developed granoblastic texture. Intrudes Beardsley and Pumpkin Ground orthogneisses. Maximum age from zircons is 417+/-1.5 Ma. Conservative interpretation of isotopic data is crystallization between 393 and 419 Ma and therefore, authors assign an age of 406+/-13 Ma (Late Silurian to Early Devonian) to the Ansonia (Sevigny and Hanson, 1993) per CT007.
Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. 
|Ordovician - Neoproterozoic|
443.8 - 1000 Ma
|Precambrian-Phanerozoic sedimentary rocks|
Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529.