ClipArt ETC
"Diabantite, ore material, and agate in vesicle of main basalt. The radial mass occupying the center is diabantite, the opaque material surrounding it is magnetite or ilmenite, and the outer rim is agate." -Walcott, 1901

Diabantite

"Diabantite, ore material, and agate in vesicle of main basalt. The radial mass occupying the center…

"Dip, in geology, the name given to the angle of slope of inclined rock strata, as dip in the diagram...The horizontal direction at right angles to the line of dip is called the strike, shown by st in the diagram." -Foster, 1921

Dip

"Dip, in geology, the name given to the angle of slope of inclined rock strata, as dip in the diagram...The…

"Section showing displacement of strata by a fault. a and a were once a continuous mass of rock." -Whitney, 1911

Displacement of Strata

"Section showing displacement of strata by a fault. a and a were once a continuous mass of rock." -Whitney,…

The image shows the displacement in the strata of rock that is caused by a geological fault.

Fault

The image shows the displacement in the strata of rock that is caused by a geological fault.

"Diagram showing a reverse or overthrust fault (b)." -Lee, 1915

Reverse Fault

"Diagram showing a reverse or overthrust fault (b)." -Lee, 1915

"Diagram showing normal faults (a)." -Lee, 1915

Normal Faults

"Diagram showing normal faults (a)." -Lee, 1915

A geologist collecting and studying rocks.

Geologist

A geologist collecting and studying rocks.

"Diagrammatic structure section of the Wasatch Range in Ogden Canyon." -Lee, 1915

Rock Layers Showing Geological Periods

"Diagrammatic structure section of the Wasatch Range in Ogden Canyon." -Lee, 1915

"Generalized columnar section, northern Black Hills." -Walcott, 1901

Strata Thickness

"Generalized columnar section, northern Black Hills." -Walcott, 1901

"Geologic units penetrated by water wells in Seminole County." -Barraclough, 1962

Water Wells

"Geologic units penetrated by water wells in Seminole County." -Barraclough, 1962