Kt Boundary Collection

GEOLOGY: K-T boundary Sample of the K-T boundary claystone from the Sussex locality, Wyoming, USA
FG-ea-733 GEOLOGY: K-T boundary - Sample of the K-T boundary claystone from the Sussex locality, Wyoming, USA Sample is 18 mm thick

GEOLOGY: K-T boundary site The photo depicts the Sussex locality, north of Casper, Wyoming, USA
FG-ea-729 GEOLOGY: K-T boundary site - The photo depicts the Sussex locality, north of Casper, Wyoming, USA. The boundary layer is indicated by the line on the photograph

GEOLOGY: K-T boundary site The photo depicts a hill near the town of Sussex, north of Casper, Wyoming, USA
FG-ea-727 GEOLOGY: K-T boundary site - The photo depicts a hill near the town of Sussex, north of Casper, Wyoming, USA The KT boundary layer is located on top of the grey sediments near the base of

GEOLOGY: K-T boundary Sussex site, north of Casper, Wyoming Collecting a sample of rock at the K-T boundary for museum
FG-ea-742 GEOLOGY: K-T boundary - Sussex site, north of Casper, Wyoming Collecting a sample of rock at the K-T boundary for museum display

GEOLOGY: K-T boundary K-T boundary Sussex locality, Wyoming, USA. The ruler
FG-ea-736 GEOLOGY: K-T boundary - K-T boundary Sussex locality, Wyoming, USA. The ruler and brush rest on the top of the K-T boundary layer

GEOLOGY: K-T boundary Close-up of the K-T boundary claystone layer at the Sussex locality, Wyoming, USA
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)

GEOLOGY: K-T boundary The K-T boundary claystone layer at the Sussex locality, Wyoming, USA
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)

Cretaceous-Tertiary Impact, artwork
Cretaceous-Tertiary Impact. Computer artwork of a large asteroid hitting Earth 65 million years ago. The impact formed the Chicxulub crater on Mexicos Yucatan Peninsula

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The K-T boundary, located at the Sussex locality in Wyoming, USA, is a significant geological site that marks a crucial transition in Earth's history. This boundary layer separates the uppermost part of the Lance Formation from the Cretaceous period. The K-T boundary claystone sample collected from this site showcases its unique characteristics. Measuring 18 mm thick, this fragile laminated carbonaceous layer contains grains of sand like quartz. Its distinct composition and structure provide valuable insights into the events that occurred during this critical time period. A photo of the Sussex locality reveals a hill near the town of Sussex, north of Casper. The K-T boundary layer is indicated by a line on the photograph, clearly demarcating it from other sediments below. Geologists collecting rock samples at this site for museum display ensure to include both Cretaceous rocks under the boundary as well as specimens from within the boundary layer itself. These samples help researchers study and understand various aspects related to paleontology and environmental changes during this era. Close-up images showcase detailed views of the K-T boundary claystone layer. At its bottom lies mudstone deposits belonging to Lance Formation from Cretaceous times. Artwork depicting an impact event known as Cretaceous-Tertiary Impact further highlights how significant events shaped our planet's history during this time frame.