Snowball Earth 650 mya
Geologic period: Pre-Cambrian
Pictured:
"Snowball Earth," the early Earth covered by glaciers and slush- or ice-bound oceans
About this image:
Some of the geophysical features of very ancient rocks and sediments can best be explained -- some scientists believe -- by the hypothesis that at some point prior to the Cambrian the Earth was covered in large part by ice. This "Snowball Earth" hypothesis suggests that glaciers covered all or almost all of the land, and that ice covered all or most of the oceans.
Notes:
Snowball Earth is hypothesized in part because of the evidence of glacially-formed sediments on land masses that were at tropical latitudes when the sediments were formed... The formation of glacial sediments at the tropics strongly suggests that the entire Earth would have been ice covered, but it is difficult to demonstrate the every portion of the Earth was so covered.
Image and client information:
Snowball Earth 650 mya.
For The Teaching Company.
© by Karen Carr
See more images of the Pre-Cambrian.
See more images of Dinosaurs and ancient life.
Karen in the classroom
— As a guest speaker or lecturer
In addition to the time she spends painting, Karen finds time now and again to serve as a guest speaker, lecturer and instructor to museum groups, professional organizations, schools and universities. She has also presented master classes in art and digital painting at universities in the U.S.
Karen has delivered recent presentations for these institutions and groups:
- Smithsonian National Museum of Natural History
- Southern Methodist University
- Guild of Natural Science Illustrators at the College of William & Mary and at Montana State University
- New Mexico Highlands University
- University of Texas at Arlington
- University of North Texas
- Dallas Paleontological Society
Originally trained in the classical techniques of illustration and painting, Karen frequently speaks on the transition to a digital world, and on the challenges and benefits this transition poses for artists, clients and viewers. She conducts professional seminars on painting, illustration and digital image creation, and also offers specific programs tailored to the needs of professional groups or classroom instructors.
To contact Karen about a speaking engagement, just drop her a note or call her studio.
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