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Becker Quarry, East Hampton (Chatham), Middlesex Co., Connecticut, USAi
Regional Level Types
Becker QuarryQuarry
East Hampton (Chatham)- not defined -
Middlesex Co.County

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Lock Map
Latitude & Longitude (WGS84): 41° 33' 50'' North , 72° 28' 35'' West
Latitude & Longitude (decimal): 41.56389,-72.47639
GeoHash:G#: drkkqy2r1
Locality type:Quarry
Köppen climate type:Dfb : Warm-summer humid continental climate
Nearest Settlements:
East Hampton2,691 (2017)2.6km
Lake Pocotopaug3,436 (2017)4.8km
Moodus1,413 (2017)7.1km
Terramuggus1,025 (2017)7.9km
Higganum1,698 (2017)10.0km

A very small prospect on residential private property off State Route 16, last worked in 1943. Minerals are similar to the Slocum Prospect, a few miles south. Coordinates are approximate for the house.

Regions containing this locality

North America PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

4 valid minerals.

Detailed Mineral List:

Formula: Na(AlSi3O8)
Description: Part of the pegmatite matrix.
Reference: Schooner (1958, 1961)
Formula: Be3Al2(Si6O18)
Habit: elongated prisms
Colour: yellow
Description: "has yielded a few gem quality heliodors... as good as those from the more famous [Slocum prospect]" (Schooner 1958).
Reference: Schooner (1958, 1961)
Beryl var: Heliodor
Formula: Be3Al2(Si6O18)
Habit: elongated prisms
Colour: yellow
Description: "has yielded a few gem quality heliodors... as good as those from the more famous [Slocum prospect]" (Schooner 1958).
Reference: Schooner (1958, 1961)
'Columbite-(Fe)-Columbite-(Mn) Series'
Description: "a few intergrowths of columbite and microlite have been noted" (Schooner, 1958).
Reference: Schooner (1958, 1961)
Formula: K(AlSi3O8)
Description: Part of the pegmatite matrix.
Reference: Schooner (1958, 1961)
'Microlite Group'
Formula: A2-mTa2X6-wZ-n
Colour: submetallic black to resinous yellow
Description: "The finest crystals of the mineral which he has yet found in the region were obtained from the small Becker Quarry...between 1945 and 1950. Microlite crystals, up to an inch in diameter, and showing a wide variety of forms, were chiselled out of a matrix of feldspar and smoky quartz. The author has a box containing fifty of these little crystals. They are sharp and beautifully developed, ranging in color from a submetallic black to a resinous yellow...a difference in composition obviously being exemplified in the zoning of colors. All are quite strongly radioactive." (Schooner, 1958)
Reference: Rocks & Minerals (1995) 70:396-409; Schooner (1958, 1961)
Formula: SiO2
Colour: smoky
Description: Part of the pegmatite matrix.
Reference: Schooner (1958, 1961)

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
'Microlite Group'4.00.A2-mTa2X6-wZ-n
Group 9 - Silicates
var: Heliodor9.CJ.05Be3Al2(Si6O18)
Unclassified Minerals, Rocks, etc.
'Columbite-(Fe)-Columbite-(Mn) Series'-

List of minerals arranged by Dana 8th Edition classification

'Microlite Group'
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Unclassified Minerals, Mixtures, etc.
var: Heliodor
'Columbite-(Fe)-Columbite-(Mn) Series'-

List of minerals for each chemical element

Be Beryl (var: Heliodor)Be3Al2(Si6O18)
Be BerylBe3Al2(Si6O18)
O Beryl (var: Heliodor)Be3Al2(Si6O18)
O BerylBe3Al2(Si6O18)
O AlbiteNa(AlSi3O8)
O QuartzSiO2
O MicroclineK(AlSi3O8)
Na AlbiteNa(AlSi3O8)
Al Beryl (var: Heliodor)Be3Al2(Si6O18)
Al BerylBe3Al2(Si6O18)
Al AlbiteNa(AlSi3O8)
Al MicroclineK(AlSi3O8)
Si Beryl (var: Heliodor)Be3Al2(Si6O18)
Si BerylBe3Al2(Si6O18)
Si AlbiteNa(AlSi3O8)
Si QuartzSiO2
Si MicroclineK(AlSi3O8)
K MicroclineK(AlSi3O8)
Ta Microlite GroupA2-mTa2X6-wZ-n

Regional Geology

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.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Devonian - Silurian
358.9 - 443.8 Ma

ID: 3186140
Paleozoic sedimentary and volcanic rocks

Age: Paleozoic (358.9 - 443.8 Ma)

Lithology: Mudstone-carbonate-sandstone-conglomerate

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. [154]

541 - 1000 Ma

ID: 2744518
Hebron Gneiss

Age: Neoproterozoic (541 - 1000 Ma)

Stratigraphic Name: Hebron Gneiss

Description: Interlayered dark-gray, medium- to coarse-grained schist, composed of andesine, quartz, biotite, and local K-feldspar, and greenish-gray, fine- to medium-grained calc-silicate rock, composed of labradorite, quartz, biotite, actinolite, hornblende, and diopside, and locally scapolite. Local lenses of graphitic two-mica schist.

Comments: Part of Eastern Uplands; Iapetus (Oceanic) Terrane - Merrimack Synclinorium; Hebron Gneiss and equivalent formations (including equivalents of Paxton and Oakdale Formations of Massachusetts) (including Bigelow Brook and Southbridge Formations) (Silurian and Ordovician). The Hebron Formation is here restricted to rocks in the area south and west of the Willimantic dome, south of the Wangumbaug Lake fault, and west of a fault in the Fitchville quad delineated by the Lebanon Gabbro. It includes the type area of the Hebron. Other rocks formerly mapped as Hebron are here assigned to the Oakdale, Dudley, and Southbridge Formations. It is separated from all other stratigraphic units by fault or intrusive contacts across which no stratigraphy can be correlated. Age is Late Proterozoic(?) based on correlation with part of the Paxton Group (Pease, 1989) per CT013. Original map source: Connecticut Geological and Natural History Survey, DEP, in cooperation with the U.S. Geological Survey, 2000, Bedrock Geology of Connecticut, shapefile, scale 1:50,000

Lithology: Major:{schist,calc silicate rock}

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. [133]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License


Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Schooner, Richard. (1958), The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). Published by Richard Schooner; Ralph Lieser of Pappy’s Beryl Shop, East Hampton; and Howard Pate of Fluorescent House, Branford, Connecticut.
Schooner, Richard. (1961), The Mineralogy of Connecticut. Fluorescent House, Branford, Connecticut.
Weber, Marcelle H. and Earle C. Sullivan. (1995), Connecticut Mineral Locality INDEX. Rocks & Minerals (Connecticut Issue): 70(6): 401.

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