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Boylston quarry, Guysborough Co., Nova Scotia, Canada

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Latitude & Longitude (WGS84): 45° 26' 47'' North , 61° 29' 34'' West
Latitude & Longitude (decimal): 45.44639,-61.49278
Köppen climate type:Dfb : Warm-summer humid continental climate

A small road-fill quarry. This location has produced large numbers of excellent quartz crystals. Many crystals are found as floaters, having been shattered from the matrix and later healed by continued growth. Tabular crystals are common and Faden crystals have also been found. Nearly all of the crystals are colored orange to red due to iron staining.

Mineral List

8 valid minerals.

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

252.17 - 541 Ma

ID: 3187973
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. [154]

Early Carboniferous - Devonian
323.2 - 419.2 Ma

ID: 2682805
Horton Group

Age: Paleozoic (323.2 - 419.2 Ma)

Stratigraphic Name: Wilkie Brook Formation; Falls Formation; Nuttby Formation; Greville River Formation; Rapid Brook Formation

Description: 0-1650 m thick undivided. Includes the Wilkie Brook Formation, Falls Formation, Nuttby Formation, Greville River Formation, and Rapid Brook Formation. Wilkie Brook Formation: fluvial sandstone, siltstone, conglomerate, shale, limestone, >206 m (Courceyan-Chadian (Tn3-V1/2) spores). Falls Formation: alluvial conglomerate, wacke, siltstone, 1600 m. Nuttby Formation: alluvial wacke, siltstone, conglomerate, fluvial argillite, rare lacustrine limestone and felsic volcanic rocks, 1200 m (Tournaisian spores). Greville River Formation and Rapid Brook Formation: alluvial conglomerate, wacke, sandstone, fluvial siltstone and argillite

Reference: Kippie, J.D. (compiler), B.E. Fisher, J.C. Poole. Geological Map of the Province of Nova Scotia, Scale 1:500 000. Nova Scotia Department of Natural Resources. [118]

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

This page contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


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Robinson, G.W., et al., "What's New in Minerals", Mineralogical Record, vol. 23, no. 5, pp. 428, Sept-Oct 1992.

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