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Extinction Gallery

Available as Prints and Gift Items

Choose from 11 pictures in our Extinction collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.


FG-EA-733
FG-EA-733
Full Range of Prints and Gifts in Stock
FG-EA-729
FG-EA-729
Full Range of Prints and Gifts in Stock
FG-EA-727
FG-EA-727
Full Range of Prints and Gifts in Stock
FG-EA-743
FG-EA-743
Full Range of Prints and Gifts in Stock
FG-EA-737
FG-EA-737
Full Range of Prints and Gifts in Stock
FG-EA-742
FG-EA-742
Full Range of Prints and Gifts in Stock
FG-EA-736
FG-EA-736
Full Range of Prints and Gifts in Stock
FG-EA-732
FG-EA-732
Full Range of Prints and Gifts in Stock
FG-EA-731
FG-EA-731
Full Range of Prints and Gifts in Stock
PM-10213 Butterfly Goodeid
PM-10213 Butterfly Goodeid
Full Range of Prints and Gifts in Stock
PM-10212 Butterfly Goodeid
PM-10212 Butterfly Goodeid
Full Range of Prints and Gifts in Stock
FG-EA-731 Featured Image

FG-EA-731

FG-ea-731
GEOLOGY: K-T boundary - The K-T boundary claystone layer at the Sussex locality, Wyoming, USA
At bottom of the image is the mudstone of the Lance Formation (Cretaceous). On top is a coal bed of the Tullock Member of the Fort Union Formation (Tertiary). The K-T boundary layer is the gray to white kaolinitic claystone, less than 2 cm thick, at about the middle of the photo. On top of it is a darker, laminated layer a few millimeters thick, containing sand grains, many of them showing multiple sets of parallel fractures ("shocked quartz") under the microscope. Iridium can be detected in the claystone layer and in the carbonaceous layer immediately above it.
Francois Gohier

© Francois Gohier / ardea.com