ClipArt ETC

The Rocks ClipArt gallery includes 65 examples of all three types of rocks: igneous, sedimentary, and metamorphic.

"A variety of quartz which is peculiar in consisting of bands or layers of various colors blended together."-Whitney, 1902

Agate

"A variety of quartz which is peculiar in consisting of bands or layers of various colors blended together."-Whitney,…

A polished agate rock with concentric circles.

Polished Agate

A polished agate rock with concentric circles.

"Igneous rocks or lavas of various composition."-Whitney, 1902

Amygdaloid

"Igneous rocks or lavas of various composition."-Whitney, 1902

"Andalusite is an aluminum silicate...found in imbedded crystals in clay slate." -Dana, 1883

Andalusite

"Andalusite is an aluminum silicate...found in imbedded crystals in clay slate." -Dana, 1883

"Orthohombric. Usually in tabular diamond-shaped crystals, formed by a short prism terminated by low brachydomes. The brachydomes are usually striated parallel to the brachy-axis. Twinned at times, giving stellate groups; the different individuals of the twin groups being distinguished from each other by the direction of the striations upon them." — Ford, 1912

Arsenopyrite

"Orthohombric. Usually in tabular diamond-shaped crystals, formed by a short prism terminated by low…

Basalt, showing typical diabasic structure of lath-shaped crystals of plagioclase.

Basalt

Basalt, showing typical diabasic structure of lath-shaped crystals of plagioclase.

"Columnar structure in the basalt of the main sheet, south end of East Hill Cliff, near South Britain, Connecticut." -Walcott, 1901

Basalt

"Columnar structure in the basalt of the main sheet, south end of East Hill Cliff, near South Britain,…

"Diagram to illustrate the inferred structure in the vicinity of the "Triangle." Arkose conglomerate is represented by lines and ellipses, anterior basalt by the black areas, anterior shale by parallel lines, and main basalt by cross-hachure areas. The finer hachuring (and hence the deeper shade) corresponds to the higher blocks of the basalt." -Walcott, 1901

Basalt Diagram

"Diagram to illustrate the inferred structure in the vicinity of the "Triangle." Arkose conglomerate…

Basaltic columns in Wales.

Basaltic Columns

Basaltic columns in Wales.

"Basaltic rock interstratified with aqueous rocks; b Basaltic dyke." -Taylor, 1904

Basaltic Rock

"Basaltic rock interstratified with aqueous rocks; b Basaltic dyke." -Taylor, 1904

Diagram showing three stages in the downward progress of a boulder on a sloping hillside under the action of frost.

Boulder

Diagram showing three stages in the downward progress of a boulder on a sloping hillside under the action…

Bronzite diabase, showing lath-shaped plagioclase crystals.

Bronzite Diabase

Bronzite diabase, showing lath-shaped plagioclase crystals.

"Vertical section of Calamite, cut through node." -Taylor, 1904

Calamite

"Vertical section of Calamite, cut through node." -Taylor, 1904

"Transverse section of Calamite, showing cortical layer surrounding woody wedges." -Taylor, 1904

Calamite

"Transverse section of Calamite, showing cortical layer surrounding woody wedges." -Taylor, 1904

This illustration shows a more or less perfect columnar structure, due to constraction on cooling, is exemplified often by igneous rocks.

Columnar Rock

This illustration shows a more or less perfect columnar structure, due to constraction on cooling, is…

A mineral having convex elevations and concave depressins looking like shells.

Conchoidal

A mineral having convex elevations and concave depressins looking like shells.

This illustration shows a rock made up of rounded concretions, having a concentric structure.

Concretionary Structure

This illustration shows a rock made up of rounded concretions, having a concentric structure.

This illustration shows a rock made up of flattened or disk-shaped concretions.

Concretionary Structure

This illustration shows a rock made up of flattened or disk-shaped concretions.

This illustration shows a rock made up of all kinds of concretionary objects.

Concretionary Structure

This illustration shows a rock made up of all kinds of concretionary objects.

"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…

"Hexagonal-rhombohedral. Crystals are usually the unit rhombohedron (cleavage rhombohedron). Faces often curved, and sometimes so acurately as to form "saddle-shaped" crystals. Other forms rare." — Ford, 1912

Dolomite

"Hexagonal-rhombohedral. Crystals are usually the unit rhombohedron (cleavage rhombohedron). Faces often…

Eolianite or aeolianite is any rock formed by the lithification of sediment deposited by aeolian processes; that is, the wind. In common use, however, the term refers specifically to most common form of eolianite: coastal limestone consisting of carbonate sediment of shallow marine biogenic origin, formed into coastal dunes by the wind, and subsequently lithified. It is also known as kurkar in the Middle East, miliolite in India and Arabia, and gres dunaire in the eastern Mediterranean.

Eolianite

Eolianite or aeolianite is any rock formed by the lithification of sediment deposited by aeolian processes;…

"Garnets distributed through a mica schist." -Dana, 1883

Garnet

"Garnets distributed through a mica schist." -Dana, 1883

"A concretionary stone or pebble, hollow inside, and often having the walls of the cavity lined with crystals." -Whitney, 1911

Quartz Geode

"A concretionary stone or pebble, hollow inside, and often having the walls of the cavity lined with…

"GEYSERITE. The variety of opaline silica deposited about the orifices of geysers. It occurs white or grayish, porous, in stalactitic, filamentous, or cauliflower-like forms." -Whitney, 1911

Geyserite

"GEYSERITE. The variety of opaline silica deposited about the orifices of geysers. It occurs white or…

A grain of sand as it appears under a microscope.

Grain of Sand

A grain of sand as it appears under a microscope.

Granite texture, holocrystalline.

Granite

Granite texture, holocrystalline.

A piece of limestone.

Limestone

A piece of limestone.

Granular crystallized limestone (marble) seen under crossed nicols.

Limestone

Granular crystallized limestone (marble) seen under crossed nicols.

Limestone polished, furrowed, and scratched by the modern glacier of Rosenlaui, Switzerland.

Limestone

Limestone polished, furrowed, and scratched by the modern glacier of Rosenlaui, Switzerland.

Fragment of the wall rock (limestone) included in an ancient sandstone dike; the rock is shattered and the sand (shaded) injected into the fissures.

Limestone Fragment

Fragment of the wall rock (limestone) included in an ancient sandstone dike; the rock is shattered and…

A lithophysa (plural lithophysae) is a small cavity found in felsic volcanic rocks believed to be caused by expanding gases in tuffs before solidification.

Lithophysa

A lithophysa (plural lithophysae) is a small cavity found in felsic volcanic rocks believed to be caused…

Nodule of oxide of manganese from Red Clay of abyssal ocean bottom.

Oxide of Manganese

Nodule of oxide of manganese from Red Clay of abyssal ocean bottom.

"Microscopic Structure of white Statuary marble." -Geikie, 1893

Marble

"Microscopic Structure of white Statuary marble." -Geikie, 1893

"Orthorhombic. Crystals commonly tabular parallel to basal plane, showing also short prisms and low brachydomes. The brachydomes usually striated parallel to the brachy-axis. Often twinned, given coxcomb and spear-shaped groups." — Ford, 1912

Marcasite

"Orthorhombic. Crystals commonly tabular parallel to basal plane, showing also short prisms and low…

A menhir is a large upright standing stone. Menhirs may be found singly as monoliths, or as part of a group of similar stones. Their size can vary considerably; but their shape is generally uneven and squared, often tapering towards the top. Menhirs are widely distributed across Europe, Africa, and Asia, but are most numerous in Western Europe; in particular in Ireland, Great Britain and Brittany.

Group of Menhirs

A menhir is a large upright standing stone. Menhirs may be found singly as monoliths, or as part of…

"Homestake open cut, sills in Cambrian, showing Algonkian schist below." -Walcott, 1901

Rock Mining

"Homestake open cut, sills in Cambrian, showing Algonkian schist below." -Walcott, 1901

"Classification of Miocene rocks in Florida." -Scott, 1981

Miocene Rocks

"Classification of Miocene rocks in Florida." -Scott, 1981

Crest of northern frontal moraine, looking northwest.

Frontal Moraine

Crest of northern frontal moraine, looking northwest.

Section of frontal moraine on side of Warner Street, Glouchester, Massachusetts.

Section of Frontal Moraine

Section of frontal moraine on side of Warner Street, Glouchester, Massachusetts.

Where two glacial streams unite, their adjoining lateral moraines become confluent and are continued as a medial moraine.

Medial Moraine

Where two glacial streams unite, their adjoining lateral moraines become confluent and are continued…

Bird's eye view of about 2 square miles of terminal moraine. Lakes shown by horizontal shading; swamps are dotted.

Terminal Moraines

Bird's eye view of about 2 square miles of terminal moraine. Lakes shown by horizontal shading; swamps…

Nummulite limestone.

Nummulite Limestone

Nummulite limestone.

Perlite. Thin section under the microscope, enlarged 30 diameters.

Perlite

Perlite. Thin section under the microscope, enlarged 30 diameters.

Well-rounded quartz grains from ancient eolian rock, enlarged by secondary addition of silica in optical continuity with the old quartz.

Quartz Grains

Well-rounded quartz grains from ancient eolian rock, enlarged by secondary addition of silica in optical…

Thin section of quartz sandstone shown under the microscope. The original rounded quartz grains are surrounded by new quartz, forming quartzite.

Quartz Sandstone

Thin section of quartz sandstone shown under the microscope. The original rounded quartz grains are…

"The impressions of the large rain-drops of a short shower made on a half-dry mud, have often been preserved in the rocks." -Dana, 1883

Rain Prints

"The impressions of the large rain-drops of a short shower made on a half-dry mud, have often been preserved…

Marks made by water spreading over shells of stones that are lodged in the sand, in this image in Silurian sandstone.

Rill Marks

Marks made by water spreading over shells of stones that are lodged in the sand, in this image in Silurian…

The marks created in mud or sand by flowing water, often found in sandstone.

Ripple Marks

The marks created in mud or sand by flowing water, often found in sandstone.

Rock in the water.

Rock

Rock in the water.

An illustration of a man standing upon stacked rocks.

Rock formation

An illustration of a man standing upon stacked rocks.

An illustration of a view from Rock City.

Rock Formation

An illustration of a view from Rock City.

Basaltic rock is a common extrusive volcanic rock. Fingal's Cave is a sea cave composed of basaltic rocks on the uninhabited island of Staffa, in the Inner Hebrides of Scotland. It has a naturally arched roof, and with the eerie sounds produced by the echoes of waves, it has the atmosphere of a natural cathedral.

Basaltic Rock

Basaltic rock is a common extrusive volcanic rock. Fingal's Cave is a sea cave composed of basaltic…

Diagram showing the interrelations of the Endogenetic rocks.

Endogenetic Rocks

Diagram showing the interrelations of the Endogenetic rocks.

A diagram of the interrelations of the Exogenetic rocks.

Exogenetic Rocks

A diagram of the interrelations of the Exogenetic rocks.

An illustration of a group of three rocks.

Group of Rocks

An illustration of a group of three rocks.

Two of the interlocking prisms or stylolites, showing the striated sides produced by friction during the process of interpenetration.

Stylolites

Two of the interlocking prisms or stylolites, showing the striated sides produced by friction during…

Shiny, black, oblong stone.

Tourmaline

Shiny, black, oblong stone.

Trachyte is an igneous, volcanic rock with an aphanitic to porphyritic texture.

Trachyte-phonolite

Trachyte is an igneous, volcanic rock with an aphanitic to porphyritic texture.

This illustration shows veins that have formed within rocks.

Vein-form Condition

This illustration shows veins that have formed within rocks.