Hartung Quarry
Hartung quarry once exposed a thick section of interreef beds, but it has been almost entirely filled. The top photo was taken in 1962 and the bottom photo was taken in 1988. Note the same electric pole in both photos.
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Hartung Quarry
© The Field Museum - CC BY-NC
Hartung Quarry
© The Field Museum - CC BY-NC
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North America, USA, Wisconsin, Milwaukee, Hartung Quarry. [LL]
