Checked content


Applications-graphics.svg This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: Vectorized. The original can be viewed here: Volcanosed.gif. Modifications made by Hardwigg.

English: A schematic geological cross-section of a sequence of sedimentary rocks that are later intruded by igneous rocks accompanied by volcanic activity.
Date 2010-10-31 21:20 (UTC)
  • United States Geological Survey - Geologic History of Lake Mead National Recreation Area:
Author United States Geological Survey
  • derivative work: Hardwigg
( Reusing this file)
Public domain This image is in the public domain because it contains materials that originally came from the United States Geological Survey, an agency of the United States Department of the Interior. For more information, see the official USGS copyright policy.

български | català | Deutsch | English | español | eesti | suomi | français | galego | italiano | 한국어 | македонски | മലയാളം | Nederlands | polski | português | русский | Türkçe | 中文 | 中文(简体)‎ | +/−

USGS logo green.svg
The following pages on Schools Wikipedia link to this image (list may be incomplete):


What is Schools Wikipedia?

Wikipedia for Schools is one of SOS Children's many educational projects. By supporting vulnerable children right through to adulthood, SOS Children makes a lasting difference to the lives of thousands of people. Education is a key part of our work, and our schools provide high-quality teaching to the children in our care. We have helped children in Africa for many years - you can help too...