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Volcano > Unconformity
The following information is about Unconformity.
Unconformity Defined
A substantial break or gap in the geologic record where a rock unit is overlain by another that is not next in stratigraphic sucession, such as an interruption in continuity of a depositional sequence of sedimentary rocks or a break between eroded igneous rocks and younger sedimentary strata. It results from a change that caused deposition to cease for a considerable time, and it normally implies uplift and erosion with loss of the previous formed record.
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Off-site Unconformity Links, User Submitted
The following links have been collected through user bookmark submission in the Unconformity category. Please note, because these resources are off-site we cannot guarantee the accuracy or quality of any information.
Sun Mar 22
Tue Oct 28
- Siccar Point: Siccar Point Field Excursion Preview Introduction This preview is intended to give you a good idea of what the Siccar Point excursion is all about in terms of location and geological features. It is not an alternative to the excursion. You might think of it as briefing notes - the more you know in advance the more you will be able to engage in discussion and observation during the event. You will meet two major rock formations: * Silurian greywackes laid down in a deep sea environment about 425 million years ago. * Devonian sandstones deposited on a broad coastal plain periodically flooded by the sea about 345 million years ago.
Sat Jul 26
Fri Feb 1
- Images of Siccar Point: high res images of siccar point
Wed Jan 30
- Beach 4 angular unconformity on Flickr - Photo Sharing!: Layers of exposed sandstone and shale covered by glacial deposits at the entrance to Beach 4 along the Washington Pacific coast.
Thu Oct 6
- ASK A GEOLOGIST: ct geology
If you would like to find additional social bookmark based links on the topic of we recommend the Open Tag Directory > Unconformity. If you would like to find related tags we recommend Tag Patterns > Unconformity
Off-site Unconformity Research Links
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