Category:Basalt from the Portage Lake Volcanic Series

Subcategories

This category has only the following subcategory.

Media in category "Basalt from the Portage Lake Volcanic Series"

The following 8 files are in this category, out of 8 total.

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  Allouez Conglomerate-flood basalt contact (Portage Lake Volcanic Series, upper Mesoproterozoic, 1.094 Ga; Delaware Copper Mine, Keweenaw Peninsula, Upper Peninsula of Michigan, USA) 2.jpg 3,862 × 2,560; 7.28 MB
  
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  Allouez Conglomerate-flood basalt contact (Portage Lake Volcanic Series, upper Mesoproterozoic, 1.094 Ga; Delaware Copper Mine, Keweenaw Peninsula, Upper Peninsula of Michigan, USA).jpg 626 × 913; 540 KB
  
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  Amygdaloidal basalt (Portage Lake Volcanic Series, upper Mesoproterozoic, 1.093 to 1.097 Ga; Keweenaw Peninsula, Upper Peninsula of Michigan, USA) 10.jpg 3,721 × 2,242; 5.46 MB
  
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  Amygdaloidal basalt (upper Portage Lake Volcanic Series, upper Mesoproterozoic, ~1.094 Ga; Delaware Copper Mine, Upper Peninsula of Michigan, USA) 3.jpg 3,927 × 2,613; 7.14 MB
  
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  Amygdaloidal basalt (upper Portage Lake Volcanic Series, upper Mesoproterozoic, ~1.094 Ga; Delaware Copper Mine, Upper Peninsula of Michigan, USA) 4.jpg 4,000 × 2,439; 7.91 MB
  
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  Cupriferous amygdaloidal basalt (Kearsarge Flow, Portage Lake Volcanic Series, upper Mesoproterozoic, 1.095 Ga; South Kearsarge Mine, Upper Peninsula of Michigan, USA) 1.jpg 960 × 626; 528 KB
  
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  Epidotic vesicular basalt (Portage Lake Volcanic Series, upper Mesoproterozoic, 1.093 to 1.097 Ga; Gratiot Mine, Keweenaw Peninsula, Upper Peninsula of Michigan, USA) 3 (9393657643).jpg 1,304 × 1,095; 374 KB
  
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  Glacially-grooved basalt (Scales Creek Flow, Portage Lake Volcanic Series, upper Mesoproterozoic, ~1.095-1.096 Ga; Surveyor's Arch outcrop, Houghton, Upper Peninsula of Michigan, USA) (8280979561).jpg 960 × 614; 425 KB