Photograph as originally submitted to this page in the Historical Marker Database www.HMdb.org. Click on photo to resize in browser. Scroll down to see metadata.

Caption: Marker detail: drilling and setting explosive charges by hand
Additional Description: Block-cave mining didn't make drilling and setting explosive charges by hand obsolete, just dramatically more productive. In 1964's Big Shot, one pound of explosives effectively broke more than 36,000 pounds of rock. That same pound of dynamite fractured only about 200 pounds with previous mining techniques.
Submitted: September 3, 2018, by Cosmos Mariner of Cape Canaveral, Florida.
Database Locator Identification Number: p444068
File Size: 0.552 Megabytes

To see the metadata that may be embedded in this photo, sign in and then return to this page.