Westward view through Atigun Gorge. Atigun River f...

Typical view of the northeastern NPRA coastal plai...

Typical view of the northeastern NPRA coastal plai...

Typical view of the northeastern NPRA coastal plai...

Thermokarst lakes on the northeastern NPRA coastal...

Pingo on the northeastern NPRA coastal plain, with...

Permafrost polygons on the northeastern NPRA coast...

One of the discovery wells drilled during the past...

Eastward view from the upper Fortress Mountain For...

Southward view along the Trans-Alaska Pipeline and...

Trans-Alaska Pipeline in front of Albian-Cenomania...

Contact between marine slope facies below and shel...

Vertical standing sandstone in Albian-Cenomanian T...

Vertical standing sandstone in Albian-Cenomanian T...

Heterolithic sediment gravity flow deposits in the...

Series of bluffs along the Colville River (foregro...

Hauterivian Kemik Sandstone, which in this exposur...

Sandstone of sediment-gravity-flow origin in succe...