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| A terrane in geology is a fragment of crustal material formed on, or broken off from, one tectonic plate and accreted |
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| In plate tectonics, a convergent boundary – also known as a convergent plate boundary or a destructive plate boundary (because of its cause of destruction) – is an actively deforming region where two (or more) tectonic plates or fragments of lithosphere move toward one another and collide. |
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| In structural geology, an anticline is a fold that is convex up and has its oldest beds at its core. The term is not to be confused with antiform, which is a purely descriptive term for any fold that is convex up. Therefore if age relationships (i.e. younging direction) between various strata are unknown, the term antiform must be used. |
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| In geology, a dome is a deformational feature consisting of symmetrically-dipping anticlines; their general outline on a geologic map is circular or oval. The strata in a dome are upwarped in the center; if the top of a dome is eroded off, the result will be a series of concentric strata that grow progressively older from the outside-in, with the oldest rocks exposed at the center. Many geologic domes are too large to be appreciated from the surface, and are apparent only in maps. Well-known regional structural domes include the Llano Uplift and the Ozark Dome.[1] |
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fault block mountains [image] |
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Fault-block or fault mountains are produced when normal (near vertical) faults fracture a section of continental crust. Vertical motion of the resulting blocks, sometimes accompanied by tilting, can then lead to high escarpments. These mountains are formed by the earth's crust being stretched and extended by tensional forces. Tilted blocks are common in the Basin and Range region of the western United States. Level blocks lead to the horst and graben terrain seen in northern Europe. Fault block mountains commonly accompany rifting, another indicator of tensional tectonic forces. Block mountains can also be referred to as a horst. It is a steep-sided mountain, formed where a block of the earth's crust has been squeezed upward between two parallel fault lines. Two types of block mountains are lifted and tilted. Lifted type block mountains have two steep sides exposing both sides scarps. Tilted type block mountains have one gently sloping side and one steep side with an exposed scarp. |
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| In geology a fault, or fault line, is a planar fracture in rock in which the rock on one side of the fracture has moved with respect to the rock on the other side. Large faults within the Earth's crust are the result of differential or shear motion and active fault zones are the causal locations of most earthquakes. Earthquakes are caused by energy release during rapid slippage along a fault. A fault that runs along the boundary between two tectonic plates is called a transform fault. |
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- To form bends in (a stratum of rock).
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| A fracture or crack in a rock mass along which no appreciable movement has occurred. |
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| any of several seismically active submarine mountain ranges that extend through the Atlantic, Indian, and South Pacific oceans: each is hypothesized to be the locus of seafloor spreading. |
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| a monoclinal structure or fold. |
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evidence of overturning [image] |
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| The Vendian-Cambrian delta 13C record, North Iran: evidence for overturning of the ocean before the Cambrian |
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| A tectonic boundary where two plates are moving away from each other and new crust is forming from magma that rises to the Earth's surface between the two plates. The middle of the Red Sea and the mid-ocean ridge (running the length of the Atlantic Ocean) are divergent plate boundaries. Also called passive margin, spreading zone. See more at tectonic boundary. Compare convergent plate boundary. |
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| a fault in which the rock above the fault plane is displaced upward relative to the rock below the fault plane (opposed to gravity fault ). |
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| A fault in which surfaces on opposite sides of the fault plane have moved horizontally and parallel to the strike of the fault. |
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| a low-angle reverse fault produced in rocks subjected to thrust. |
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| offering or providing hope, encouragement, salvation, etc.: an uplifting sermon. |
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| a fracture, part of a desiccation pattern, caused by the drying out and shrinking of silt or clay. |
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| A raised beach or a marine terrace is an emergent coastal landform. |
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