Slump Block

"shump (a) A landslide characterized by a shearing and rotary movement of a generally dependent mass of rock or earth along a curved slip surface (concave upward) and about parallel to the slope from which it descends, and by backward tilting of the mass with respect to that slope so that the slump surface often exhibits a reversed slope facing uphill. See also: slump block. " Glossy of Geology 5th Ed

Cannonball Concretions

"Cannonball (can'-non-ball) A large, dark concretion, as much as 3 m in diameter, resembling a cannonball, as in the Cannonball Member (Paleocene) of the Fort Union Formation in the Dakotas. " and "concretion (con-cre'-tion) (a) A hard, compact mass or aggregate of mineral matter, normally subspherical but commonly oblate, disk-shaped, or irregular with odd or fantastic outlines; formed by precipitation from aqueous solution about a nucleus or center, such as a leaf, shell, bone, or fossil, in the pores of a sedimentary or fragmental volcanic rock, and usually of a composition widely different from that of the rock in which it is found and from which it is rather sharply separated. It represents a concentration of some minor constituent of the enclosing rock or of cementing material, such as silica (chert), calcite, dolomite, iron oxide, pyrite, or gypsum, and it ranges in size from a small pellet-like object to a great spheroidal body as much as 3 m in diameter. Most concretions were formed during diagenesis, and many (especially in limestone and shale) shortly after sediment deposition." Glossary of Geology 5th Edition

Cannonball Concretions

"Cannonball (can'-non-ball) A large, dark concretion, as much as 3 m in diameter, resembling a cannonball, as in the Cannonball Member (Paleocene) of the Fort Union Formation in the Dakotas. " and "concretion (con-cre'-tion) (a) A hard, compact mass or aggregate of mineral matter, normally subspherical but commonly oblate, disk-shaped, or irregular with odd or fantastic outlines; formed by precipitation from aqueous solution about a nucleus or center, such as a leaf, shell, bone, or fossil, in the pores of a sedimentary or fragmental volcanic rock, and usually of a composition widely different from that of the rock in which it is found and from which it is rather sharply separated. It represents a concentration of some minor constituent of the enclosing rock or of cementing material, such as silica (chert), calcite, dolomite, iron oxide, pyrite, or gypsum, and it ranges in size from a small pellet-like object to a great spheroidal body as much as 3 m in diameter. Most concretions were formed during diagenesis, and many (especially in limestone and shale) shortly after sediment deposition." Glossary of Geology 5th Edition

Cannonball Concretions

"Cannonball (can'-non-ball) A large, dark concretion, as much as 3 m in diameter, resembling a cannonball, as in the Cannonball Member (Paleocene) of the Fort Union Formation in the Dakotas. " and "concretion (con-cre'-tion) (a) A hard, compact mass or aggregate of mineral matter, normally subspherical but commonly oblate, disk-shaped, or irregular with odd or fantastic outlines; formed by precipitation from aqueous solution about a nucleus or center, such as a leaf, shell, bone, or fossil, in the pores of a sedimentary or fragmental volcanic rock, and usually of a composition widely different from that of the rock in which it is found and from which it is rather sharply separated. It represents a concentration of some minor constituent of the enclosing rock or of cementing material, such as silica (chert), calcite, dolomite, iron oxide, pyrite, or gypsum, and it ranges in size from a small pellet-like object to a great spheroidal body as much as 3 m in diameter. Most concretions were formed during diagenesis, and many (especially in limestone and shale) shortly after sediment deposition." Glossary of Geology 5th Edition

Caprocks

Caprock Coulee Trail

Bentonite LAyers on Caprock COulee Trail

“Bentonite (ben'-ton-ite) (a) Soft clay or greasy claystone composed largely of smectite formed by the chemical alteration of glassy volcanic ash in contact with water. It often contains accessory crystal grains that were originally phenocrysts in the parent rock. The rock commonly has the ability to absorb large quantities of water accompanied by a large increase in volume that can result in a thixotropic gel. The term "taylorite" was used by Knight (1898), after the owner of a near Rock Springs in the Wyoming territory (see Taylor, 1897). It was later renamed 'bentonite" after the Benton Formation (formerly Fort Benton Formation) in eastern Wyoming. “ Glossary of Geology 5th Edition

Caprock Coulee Trail

Caprock Coulee Trail

Caprock Coulee Trail

Caprock Coulee Trail North Unit Theodore Roosevelt National Park

Caprock Coulee Trail

River Bend Overlook CCC pavillion

Caprock Coulee Trail

River Bend Overlook CCC pavillion

Caprock Coulee Trail

Overlooking the Little Missouri River

Caprock Coulee Trail

Bison bison (The American Buffalo) Theodore National Park

Where the "Bison" Roam Theodore National Park