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BlueRidgeSaltDome_4

Back to Schander's Photo Albums (1920's Oil Exploration)

BlueRidgeSaltDome_4

File uploaded by Lilly Hargrave.

1 Comment

Total Comments: 1

Gerhard on 5-Mar-09 6:34 AM permalink
To compensate the poor sensitivity of Mintrop's early mechanical-optical systems, large dynamite charges for every shot were necessary to get readable results.