Mass thrown out by a railway blast near Big Dome, boulders or fragments of quartzite, granite, quartz diorite, limestone, dacite and diabase; pocket watch hanging from fob (upper center) provides scale. Pinal County, Arizona. 1910.
Dates
Date Taken
1910
Summary
Mass thrown out by a railway blast near Big Dome, boulders or fragments of quartzite, granite, quartz diorite, limestone, dacite and diabase; pocket watch hanging from fob (upper center) provides scale. Pinal County, Arizona. 1910. Plate 25-B in U.S. Geological Survey. Professional paper 115. 1919.
Summary
Mass thrown out by a railway blast near Big Dome, boulders or fragments of quartzite, granite, quartz diorite, limestone, dacite and diabase; pocket watch hanging from fob (upper center) provides scale. Pinal County, Arizona. 1910. Plate 25-B in U.S. Geological Survey. Professional paper 115. 1919.
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