|Latitude & Longitude (WGS84):||44° 32' 39'' North , 70° 43' 15'' West|
|Latitude & Longitude (decimal):||44.54444,-70.72111|
|Köppen climate type:||Dfb : Warm-summer humid continental climate|
Granite pegmatite. Hall's Ridge, Plumbago-Puzzle Mountain - Oxford pegmatite field. Land currently owned by Freeman Resources, LLC.
73 valid minerals. 1 (TL) - type locality of valid minerals. 1 erroneous literature entry.
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
252.17 - 541 Ma
|Paleozoic sedimentary rocks|
Age: Paleozoic (252.17 - 541 Ma)
Lithology: 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. 
|Ludlow - Wenlock|
423 - 433.4 Ma
|Silurian Smalls Falls Formation|
Age: Silurian (423 - 433.4 Ma)
Stratigraphic Name: Smalls Falls Formation
Comments: Named the Penobscot formation for Penobscot Bay, central-south ME. Consists of metamorphosed shaly sediments (slates, schists, quartzites) typically developed along nearly whole length of western shore of Penobscot Bay. Color varies from light gray through steel gray and purplish gray to black, the darker grays being predominant. Locally injected and metamorphosed by granite and diorite. Weathered surfaces usually rusty. In a few places only the rock exhibits a very perfect slaty cleavage, highly inclined to bedding planes. Conformably overlies Battie quartzite. (ME025) Unit description from USGS GEOLEX website (ME078). AA - Low rank amphibolite facies; AB - Medium rank amphibolite facies; AC - High rank amphibolite facies; E - Epidote-amphibolite facies; GS - Greenschist facies; Protolith C - Sulfidic/carbonaceous pelite
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.