Definitions

1. Breccia is a rock made of smaller rocks, like conglomerate.
2. Breccia is a rock consisting of angular fragments of any kind, united by a matrix. (Web site)
3. Breccia is a textural term that applies to rocks of both the maria and highlands. (Web site)
4. Breccia is a detrital sedimentary rock composed mostly of large, angular clasts.
5. Breccia is an extrusive rock that contains sharp fragments of native rocks. (Web site)

Diatreme

1. Diatreme: A breccia filled volcanic pipe that was formed by a gaseous explosion.

Volcanic Breccia

1. Tuff: Tuff is similar to volcanic breccia, except that the fragments are smaller, and the matrix consists of fine volcanic material. (Web site)
2. Commonly filled with volcanic breccia and fragments of older rock.

Entirely

1. It is possible to distinguish banded tuffs and volcanic breccia that have converted entirely to clay. (Web site)

Product

1. Some 600 m below this breccia the pluton is pervaded by a fine-grained granophyre, apparently the product of a sudden and final crystallization.

Matrix

1. Volcanic breccia is composed of angular mineral fragments embedded in a matrix, the product of explosive eruptions. (Web site)
2. The tuff ring breccia contains angular blocks of Afton basalt in a matrix of unstratified pyroclastics with lower and upper crustal xenoliths. (Web site)
3. In many cases, the matrix of the breccia is rich in limonite, resulting in an attractive rock with angular chunks of white limestone in a red matrix. (Web site)

Rock Types

1. Microdiorite occurs as matrix to intrusive bodies of breccia and as irregular, indistinct dikelets (cm's thick) that cut all rock types described above. (Web site)

Fault Zone

1. Fault Breccia.jpg Outcrop of fault breccia, consisting of angular fragments produced by movement along a fault zone.

Volcano

1. Volcanic breccia may form from broken pieces of rock blasted out of a volcano or from rubble eroded from it. (Web site)

Ash

1. Each eruption produces a layer of ash, lapilli or bombs which eventually lithifies (turns to rock) to form tuff or volcanic breccia.

Rock Fragments

1. May also resemble a sedimentary conglomerate or breccia, except that rock fragments are all fine-grained igneous or vesicular. (Web site)
2. These eruptions left deposits of basaltic lava and volcanic breccia (angular, broken rock fragments held together in a matrix of finer grained material).

Sedimentary Rock

1. Breccia.jpg Hand sample of the sedimentary rock breccia.

Volcanic Rocks

1. When all the angular fragments are of volcanic rocks the mass is usually termed a volcanic breccia. (Web site)

Agglomerate

1. Includes agglomerate, breccia, scoria, cinders, ash, restricted flows, and small basaltic intrusive bodies. (Web site)

Lava

1. Lahars usually contain ash, breccia, and boulders mixed with rainwater or with river or lake water displaced by the lava flow associated with the volcano. (Web site)
2. Lahar: A mudflow of unconsolidated volcanic ash, dust, breccia, and boulders mixed with rain or the water of a lake displaced by a lava flow.

Volcanic Vent

1. Diatreme: A volcanic vent filled with breccia by the explosive escape of gases.

Volcanic Ash

1. Ignimbrite: An igneous rock formed by the lithification of volcanic ash and volcanic breccia.

Andesite

1. The breccia includes pieces of andesite, dacite and massive sulfide.
2. Locally includes some felsite, andesite and basalt flows, breccia, and agglomerate. (Web site)
3. After these volcanics were deposited, a series of dacite, andesite and rhyolite lava flows were erupted upon volcanic breccia from the first volcanic phase. (Web site)

Chlorite

1. Ceramic is not the only material used: breccia, calcite, chlorite, schist, dolomite and other colored and patterned stone were carved into pottery forms. (Web site)

Pumice

1. A range of lava from basic through intermediate to acid are present along with intrusions and volcanic clastics such as breccia and pumice.
2. Extrusive rocks defined mainly by texture are discussed under rock textures: obsidian, scoria, pumice, tuff, and volcanic breccia. (Web site)

Rhyolite

1. Tdr Dacite and rhyolite (Miocene)--Shallow intrusions and extrusive plugs and domes, and adjacent flows and breccia. (Web site)

Layers

1. Deposit minerals occur in layers, bands, and breccia.
2. Deposit minerals occur in masses, layers, and breccia.

Laminae

1. Deposit minerals occur in bands, laminae, masses, breccia, streaks, and disseminations.

Gouge

1. The fault zone consists of numerous interlacing small faults or a confused zone of gouge, breccia, or mylonite.
2. Fault planes can be distinguished from joint planes, because faults often have "slickensides", "gouge", "mylonite", "mineral veins", or "fault breccia".

Boulders

1. On the shore near the south end of the dam blocks and boulders of graywacke sandstone, volcanic breccia, limestone, and other rock litter the shoreline. (Web site)

Rocks

1. This breccia formed some 50 million years ago when watery mixtures of ash and rocks flowed down mountain slopes onto then tropical lowlands. (Web site)
2. Rocks such as tuff and volcanic breccia, which are formed from fragmental volcanic material, are sometimes grouped as pyroclastic rocks.

Rock

1. Breccia - A rock in which angular fragments are surrounded by a mass of fine-grained minerals.
2. If the fragments embedded in the matrix are angular instead of rounded, the rock is called a breccia (pronounced BRECH-i-a). (Web site)
3. The sides of the dome are mantled with crumble breccia (rock composed of large angular fragments) and tephra. (Web site)

Tuff

1. The rock here is essentially tuffaceous siltstone mixed with crystal bearing fine ash vitric tuff and tuff breccia.
2. The Mount Galen Volcanics consists of basaltic, andesitic, dacitic, and rhyolitic lavas and dacite, and rhyolite tuff and tuff breccia.
3. Ttb Tuff breccia (Miocene)--Light-colored deposits of tuff breccia, minor air-fall tuff, and tuffaceous sedimentary rocks. (Web site)

Clasts

1. Concentrations of Alamo lapilli formed lapillistone that occurs as discontinuous, reworked clasts within the Breccia. (Web site)

Fragments

1. The fragments in a breccia, however, are sharp and angular, looking as if they were just broken, while those in conglomerates are rounded. (Web site)
2. The ore occurs as breccia composed of fragments of metamorphic quartz and dolomite cemented by an aggregate of hydrozircon and baddeleyite.
3. On older minerals, or on their breccia and often regenerated fragments, there are: fluorite, epidote, zeolites, chlorites and calcite growing. (Web site)

Conglomerate

1. They include limestone, marl, sandstone, conglomerate, breccia and shale. (Web site)
2. Related Rocks: Breccia (brech'-ee-uh) looks like conglomerate, but the "pebbles" in it are jagged and blocky, not rounded. (Web site)
3. With a sedimentary rock this may be called a conglomerate, except when the breccia is discordant with former lithology (clastic dike). (Web site)

Breccia

1. It was made of roughly alternating layers of andesitic lavas and tephra (volcanic ash, breccia, and pumice) with increasing amounts of tephra with elevation.
2. The top and side margins of an inflating lava dome tend to be covered in fragments of rock, breccia and ash. (Web site)
3. Agglomerate A breccia composed largely or entirely of fragments of volcanic rocks.

Categories

1. Conglomerate
2. Fragments
3. Tuff
4. Marl
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