Aggregate Industries Quarry (Bayer-Mingolla Quarry; Trimount Quarry), Ashland, Middlesex Co., Massachusetts, USA
|Latitude & Longitude (WGS84):||42° 14' 3'' North , 71° 28' 37'' West|
|Latitude & Longitude (decimal):||42.23417,-71.47694|
|Köppen climate type:||Dfa : Hot-summer humid continental climate|
A crushed stone quarry on Zachary Hill, opened in 1948 by Bayer and Mingolla Industries. Rocks in the quarry are primarily amphibolite, hornblende schist and quartz-biotite schist. (Cahoon, 1985)
36 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
|Blackstone Group, Undivided|
Age: Neoproterozoic (541 - 1000 Ma)
Stratigraphic Name: Blackstone Group
Comments: Part of Milford-Dedham Zone (Tertiary and Older Rocks)
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.