Bedford, Hillsborough Co., New Hampshire, USA
|Latitude & Longitude (WGS84):||42° 56' 47'' North , 71° 30' 57'' West|
|Latitude & Longitude (decimal):||42.94639,-71.51583|
A town, originally established as "Narragansett Number 5" in 1730. It was later called Souhegan East, before finally being named Bedford in 1750.
Mineral ListMineral list contains entries from the region specified including sub-localities
29 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.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
541 - 1000 Ma
|Massabesic Gneiss Complex|
Age: Neoproterozoic (541 - 1000 Ma)
Description: Quartzose-feldspathic gneiss and biotite schists (locally rusty), granofels, and cal-silicate rocks closely intruded by, and grading into, a pink gneissic granite (623 Ma) that produced a migmatite.
Comments: Part of the Nashoba-Casco-Miramichi Terrane (Merrimack Trough). Map page 2: Massabesic Gneiss Complex: 620-600 U/Pb, orthogneiss(?) per NH039. 646+/-? U/Pb, paragneiss, 475+/-? U/Pb, orthogneiss per NH038. 641+/-25 Rb/Sr, paragneiss(?) per NH040. 375+/-? U/Pb, monazite from aplite dike in Campbell Hill fault at western contact of Massabesic Gneiss per Barbara Barriero, oral commun., 1990. 384+/-2 and 275+/-2 U/Pb, monazite in paragneiss per J.N. Aleinikoff, oral commun., April 1993. 623+/-8 U/Pb ion probe, orthogneiss; earlier age of 475 (NH038) discredited per J.N. Aleinikoff, oral commun., Feb. 1994.
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. 
Localities in this Region
Town of Bedford (1903): History of Bedford, New Hampshire, from 1737. (Concord, NH: Rumford Printing Co.).