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Home > Images Dated > 2005 > June > 5 Jun 2005

Images Dated 5th June 2005

Choose from 25 pictures in our Images Dated 5th June 2005 collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.


FG-EA-731 Featured 5 Jun 2005 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

FG-EA-732 Featured 5 Jun 2005 Image

FG-EA-732

FG-ea-732
GEOLOGY: K-T boundary - Close-up of 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. 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. (Reference: USGS)
Francois Gohier

© Francois Gohier / ardea.com