Collector's Note: A Glacial Treasure Unearthed from a Pleistocene Grave in Michigan's Keweenaw Peninsula.
| Autor: | Rosemeyer, Tom |
|---|---|
| Předmět: | |
| Zdroj: | Rocks & Minerals; Nov/Dec2017, Vol. 92 Issue 6, p568-575, 8p |
| Abstrakt: | The article offers information on the discovery, recovery, and preservation of a large boulder of rich copper bearing Calumet and Hecla Conglomerate float that was discovered in August 2013. It mentions that the Calumet and Hecla Conglomerate is made up of a variety of well-rounded felsite, granophyre, and quartz-feldspar porphyry pebbles, suggesting a diverse terrane source. It states that Chunks of copper-bearing Calumet and Hecla Conglomerate were recovered within the excavation. |
| Databáze: | Complementary Index |
| Externí odkaz: |
|