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Sill (geology), the Glossary

Index Sill (geology)

In geology, a sill is a tabular sheet intrusion that has intruded between older layers of sedimentary rock, beds of volcanic lava or tuff, or along the direction of foliation in metamorphic rock.[1]

Table of Contents

  1. 42 relations: Aquatic sill, Batholith, Bushveld Igneous Complex, Chromium, Country rock (geology), Dike (geology), Duluth Complex, Edinburgh, Foliation (geology), Gold, Great Dyke, Greenland, Igneous intrusion, Karoo Supergroup, Laccolith, Lake Superior, Lava, Layered intrusion, Magma chamber, Magma supply rate, Metamorphic rock, Metamorphism, Ore, Peridotite, Phanerozoic, Platinum, Precambrian, Quaternary glaciation, Rùm, Reflection seismology, Scotland, Sedimentary rock, Sheet intrusion, Sill swarm, Skaergaard intrusion, Stillwater igneous complex, Stock (geology), Stratum, Tuff, Vesicular texture, Weathering, Whin Sill.

  2. Intrusions
  3. Sills (geology)
  4. Subvolcanic rocks

Aquatic sill

An aquatic sill (or an oceanic sill) is a sea floor barrier of relatively shallow depth (tens to hundreds of meters) that restricts water movement between benthic zones of an oceanic basin or lake bottom.

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Batholith

A batholith is a large mass of intrusive igneous rock (also called plutonic rock), larger than in area, that forms from cooled magma deep in the Earth's crust.

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Bushveld Igneous Complex

The Bushveld Igneous Complex (BIC) is the largest layered igneous intrusion within the Earth's crust.

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Chromium

Chromium is a chemical element; it has symbol Cr and atomic number 24.

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Country rock (geology)

In geology, country rock is the rock native to an area, in contrast to any intrusion of viscous geologic material, commonly magma, or perhaps rock salt (in salt domes) or unconsolidated sediments.

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Dike (geology)

In geology, a dike or dyke is a sheet of rock that is formed in a fracture of a pre-existing rock body. Sill (geology) and dike (geology) are Subvolcanic rocks.

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Duluth Complex

The Duluth Complex, the related Beaver Bay Complex, and the associated North Shore Volcanic Group are rock formations which comprise much of the basement bedrock of the northeastern part of the U.S. state of Minnesota in central North America.

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Edinburgh

Edinburgh (Dùn Èideann) is the capital city of Scotland and one of its 32 council areas.

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Foliation (geology)

Foliation in geology refers to repetitive layering in metamorphic rocks.

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Gold

Gold is a chemical element; it has symbol Au (from the Latin word aurum) and atomic number 79.

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Great Dyke

The Great Dyke or Dike is a linear geological feature that trends nearly north-south through the centre of Zimbabwe passing just to the west of the capital, Harare.

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Greenland

Greenland (Kalaallit Nunaat,; Grønland) is a North American island autonomous territory of the Kingdom of Denmark.

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Igneous intrusion

In geology, an igneous intrusion (or intrusive body or simply intrusion) is a body of intrusive igneous rock that forms by crystallization of magma slowly cooling below the surface of the Earth.

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Karoo Supergroup

The Karoo Supergroup is the most widespread stratigraphic unit in Africa south of the Kalahari Desert.

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Laccolith

A laccolith is a body of intrusive rock with a dome-shaped upper surface and a level base, fed by a conduit from below.

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Lake Superior

Lake Superior is the largest freshwater lake in the world by surface areaThe Caspian Sea is the largest lake, but is saline, not freshwater.

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Lava

Lava is molten or partially molten rock (magma) that has been expelled from the interior of a terrestrial planet (such as Earth) or a moon onto its surface.

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Layered intrusion

A layered intrusion is a large sill-like body of igneous rock which exhibits vertical layering or differences in composition and texture.

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Magma chamber

A magma chamber is a large pool of liquid rock beneath the surface of the Earth. Sill (geology) and magma chamber are Volcanology.

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Magma supply rate

The magma supply rate measures the production rate of magma at a volcano. Sill (geology) and magma supply rate are Volcanology.

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Metamorphic rocks arise from the transformation of existing rock to new types of rock in a process called metamorphism.

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Metamorphism is the transformation of existing rock (the protolith) to rock with a different mineral composition or texture.

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Ore

Ore is natural rock or sediment that contains one or more valuable minerals concentrated above background levels, typically containing metals, that can be mined, treated and sold at a profit.

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Peridotite

Peridotite is a dense, coarse-grained igneous rock consisting mostly of the silicate minerals olivine and pyroxene.

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Phanerozoic

The Phanerozoic is the current and the latest of the four geologic eons in the Earth's geologic time scale, covering the time period from 538.8 million years ago to the present.

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Platinum

Platinum is a chemical element; it has symbol Pt and atomic number 78.

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Precambrian

The Precambrian (or Pre-Cambrian, sometimes abbreviated pC, or Cryptozoic) is the earliest part of Earth's history, set before the current Phanerozoic Eon.

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Quaternary glaciation

The Quaternary glaciation, also known as the Pleistocene glaciation, is an alternating series of glacial and interglacial periods during the Quaternary period that began 2.58 Ma (million years ago) and is ongoing.

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Rùm

Rùm, a Scottish Gaelic name often anglicised to Rum, is one of the Small Isles of the Inner Hebrides, off the west coast of Scotland, in the district of Lochaber.

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Reflection seismology

Reflection seismology (or seismic reflection) is a method of exploration geophysics that uses the principles of seismology to estimate the properties of the Earth's subsurface from reflected seismic waves.

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Scotland

Scotland (Scots: Scotland; Scottish Gaelic: Alba) is a country that is part of the United Kingdom.

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Sedimentary rock

Sedimentary rocks are types of rock that are formed by the accumulation or deposition of mineral or organic particles at Earth's surface, followed by cementation.

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Sheet intrusion

A sheet intrusion, or tabular intrusion, is a planar sheet of roughly the same thickness, that forms inside a pre-existing rock. Sill (geology) and sheet intrusion are Volcanology.

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Sill swarm

A sill swarm or sill complex in geology is a major group of sills intruded within continental crust. Sill (geology) and sill swarm are sills (geology) and Volcanology.

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Skaergaard intrusion

The Skaergaard intrusion is a layered igneous intrusion in the Kangerlussuaq area of East Greenland and is composed of various rocks and minerals including gabbro, olivine, apatite, and basalt.

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Stillwater igneous complex

The Stillwater igneous complex is a large layered mafic intrusion (LMI) located in southern Montana in Stillwater, Sweet Grass and Park Counties.

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Stock (geology)

In geology, a stock is an igneous intrusion that has a surface exposure of less than,Whittow, John (1984).

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Stratum

In geology and related fields, a stratum (strata) is a layer of rock or sediment characterized by certain lithologic properties or attributes that distinguish it from adjacent layers from which it is separated by visible surfaces known as either bedding surfaces or bedding planes.

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Tuff

Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption.

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Vesicular texture

Vesicular texture is a volcanic rock texture characterized by a rock being pitted with many cavities (known as vesicles) at its surface and inside. Sill (geology) and Vesicular texture are Volcanology.

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Weathering

Weathering is the deterioration of rocks, soils and minerals (as well as wood and artificial materials) through contact with water, atmospheric gases, sunlight, and biological organisms.

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Whin Sill

The Whin Sill or Great Whin Sill is a tabular layer of the igneous rock dolerite in County Durham, Northumberland and Cumbria in the northeast of England. Sill (geology) and Whin Sill are sills (geology).

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See also

Intrusions

Sills (geology)

Subvolcanic rocks

References

[1] https://en.wikipedia.org/wiki/Sill_(geology)

Also known as Geologic sill, Geological sill, Igneous sill, Submarine sill.