new icn messageflickr-free-ic3d pan white
Great Unconformity | by brewbooks
Back to photostream

Great Unconformity

There is about a 1.2 billion year gap in the rock - that is the Great Unconformity,, and this hike provided an excellent view.

 

"Powell's unconformity in the Grand Canyon is between the Tapeats Sandstone of Middle or Lower Cambrian Age, about 500 million years ago, and igneous and metamorphic rock of the Statherian Period of the Paleoproterozoic Eon, around 1700 million years old, give or take a few hundred million years, with a gap of over a billion years.

Source en.wikipedia.org/wiki/Great_Unconformity

 

Stratigraphy and Timescale

 

Clear Creek trail, Grand Canyon National Park

 

South2NorthRim day 3

 

sw2 136

956 views
1 fave
2 comments
Taken on May 16, 2011