Search results
Results from the WOW.Com Content Network
If the top of a dome has been eroded flat, the resulting structure in plan view appears as a bullseye, with the youngest rock layers at the outside, and each ring growing progressively older moving inwards. These strata would have been horizontal at the time of deposition, then later deformed by the uplift associated with dome formation. [1] [2]
The Central Basin was caused by an uplifting which produced a dome known as the Nashville Dome. The Nashville Dome is evidenced by the underlying rock strata that all dip downward away from Nashville. The uplifting of the Nashville Dome fractured overlying strata, making it more easily eroded, and thus the "dome" resulted in a "basin".
Erosion brings the rock closer to Earth's surface and the pressure from above the rock decreases; as a result the rock fractures. These fractures are known as exfoliation joints , or sheet fractures, and form in onionlike patterns that are parallel to the land surface.
Bornhardt – A large dome-shaped, steep-sided, bald rock; Butte – Isolated hill with steep, often vertical sides and a small, relatively flat top; Canyon – Deep chasm between cliffs; Cave – Natural void under the Earth's surface; Cirque – An amphitheatre-like valley formed by glacial erosion; Cliff – Tall, near vertical rock face
Examples of Erosional Landforms; Landform Description Image Deflation basin: A depression in the land that can be found in deserts due to the removal of particles by wind; it can also be referred to as a "blowout". Blowout outside of Earth, Texas: Ventifacts: Rock samples that demonstrate the erosion caused by aeolian processes over time.
A laccolith is a body of intrusive rock with a dome-shaped upper surface and a level base, fed by a conduit from below. A laccolith forms when magma (molten rock) rising through the Earth's crust begins to spread out horizontally, prying apart the host rock strata. The pressure of the magma is high enough that the overlying strata are forced ...
Sedimentary structures include all kinds of features in sediments and sedimentary rocks, formed at the time of deposition.. Sediments and sedimentary rocks are characterized by bedding, which occurs when layers of sediment, with different particle sizes are deposited on top of each other. [1]
The geographic cycle, or cycle of erosion, is an idealized model that explains the development of relief in landscapes. [1] The model starts with the erosion that follows uplift of land above a base level and ends, if conditions allow, in the formation of a peneplain . [ 1 ]