![File:Ammolite from Placenticeras fossil ammonite (Bearpaw Formation, Upper Cretaceous, 70-75 Ma; mine in St. Mary River Valley, Alberta, Canada) 15.jpg - Wikimedia Commons File:Ammolite from Placenticeras fossil ammonite (Bearpaw Formation, Upper Cretaceous, 70-75 Ma; mine in St. Mary River Valley, Alberta, Canada) 15.jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/thumb/c/c4/Ammolite_from_Placenticeras_fossil_ammonite_%28Bearpaw_Formation%2C_Upper_Cretaceous%2C_70-75_Ma%3B_mine_in_St._Mary_River_Valley%2C_Alberta%2C_Canada%29_15.jpg/640px-Ammolite_from_Placenticeras_fossil_ammonite_%28Bearpaw_Formation%2C_Upper_Cretaceous%2C_70-75_Ma%3B_mine_in_St._Mary_River_Valley%2C_Alberta%2C_Canada%29_15.jpg)
File:Ammolite from Placenticeras fossil ammonite (Bearpaw Formation, Upper Cretaceous, 70-75 Ma; mine in St. Mary River Valley, Alberta, Canada) 15.jpg - Wikimedia Commons
![Western Mass Hilltown HikersDedicated to Enjoying and Preserving the Natural Beauty of the Hilltowns #hikethehilltowns with the #westernmasshilltownhikersMarcia Mine in Chester Western Mass Hilltown HikersDedicated to Enjoying and Preserving the Natural Beauty of the Hilltowns #hikethehilltowns with the #westernmasshilltownhikersMarcia Mine in Chester](https://westernmasshilltownhikers.com/wp-content/uploads/2021/07/10_received_4011118885592266_watermark_sat_19062021_0727162795907556772123626.jpg)
Western Mass Hilltown HikersDedicated to Enjoying and Preserving the Natural Beauty of the Hilltowns #hikethehilltowns with the #westernmasshilltownhikersMarcia Mine in Chester
![Stand-Alone Downloads & Description of the Revolution 2004 Versions of The Dynamic Digital Map of the Davis Pyrite Mine, Rowe MA Stand-Alone Downloads & Description of the Revolution 2004 Versions of The Dynamic Digital Map of the Davis Pyrite Mine, Rowe MA](http://ddm.geo.umass.edu/ddm-davismine/dpm.jpg)
Stand-Alone Downloads & Description of the Revolution 2004 Versions of The Dynamic Digital Map of the Davis Pyrite Mine, Rowe MA
![Western Mass Hilltown HikersDedicated to Enjoying and Preserving the Natural Beauty of the Hilltowns #hikethehilltowns with the #westernmasshilltownhikersMarcia Mine in Chester Western Mass Hilltown HikersDedicated to Enjoying and Preserving the Natural Beauty of the Hilltowns #hikethehilltowns with the #westernmasshilltownhikersMarcia Mine in Chester](https://i0.wp.com/westernmasshilltownhikers.com/wp-content/uploads/2022/07/Compress_20220716_071327_7737.jpg?fit=1200%2C676&ssl=1&resize=350%2C200)