How old are the Hawaiian islands geologically?
GeologyThe islands of Oahu and Kauai have greater ages, with the latter being about five million years old. To the northwest, the volcanoes are progressively older, with Suiko Seamount in the northern part of the chain having an age of 65 million years. When was Hawaii formed geologically? The hotspot, which geologists estimate began producing
How does sandstone turn into granite?
GeologyHow does granite change into sandstone? Igneous rock granite formed beneath the surface millions of years ago. Then, the forces of mountain guilding slowly pushed the granite upward, forming a mountain. … Slowly, the sediments were pressed together and cemented to form sandstone, a sedimentary rock. What does sandstone turn into? With a great deal
What are the differences between the three types of seismic waves?
GeologyBody waves travel through the interior of the Earth. Surface waves travel across the surface. Surface waves decay more slowly with distance than body waves which travel in three dimensions. Particle motion of surface waves is larger than that of body waves, so surface waves tend to cause more damage. What is the difference between
How is schist formed?
GeologySchist typically forms during regional metamorphism accompanying the process of mountain building (orogeny) and usually reflects a medium grade of metamorphism. Schist can form from many different kinds of rocks, including sedimentary rocks such as mudstones and igneous rocks such as tuffs. What is schist and how is it formed? Schist is medium grade metamorphic
What are the different types of mass movements and how are they described?
GeologyMass Movement Types Types Descriptions Flows occur when soil or rock acts like a liquid Slumps a slice of material that moves as one piece along a curved surface Landslides made up of unconsolidated rock; includes rockslides and avalanches Creeps material that moves slowly down gently sloping areas What are the different types of mass
How does water cause weathering of rocks?
GeologyWater, in either liquid or solid form, is often a key agent of mechanical weathering. For instance, liquid water can seep into cracks and crevices in rock. If temperatures drop low enough, the water will freeze. When water freezes, it expands. How does water cause weathering and erosion? Water gets into cracks and joints in
What is V shaped valley?
GeologyV-Shaped Valleys A V-shaped valley is a narrow valley with steeply sloped sides that appear similar to the letter “V” from a cross-section. They are formed by strong streams, which over time have cut down into the rock through a process called downcutting. What do you mean by V-shaped valley? BSL Geography Glossary – V-shaped
What is the Protolith of serpentinite?
Geology questionsProtolith was a Proterozoic-Early Paleozoic upper mantle dunite peridotite that has been multiply metamorphosed during the Devonian, Permian, and Mesozoic. Tightly folded serpentinite from the Tux Alps, Austria. What is the parent rock of serpentinite? Serpentinite Type Metamorphic Rock Miscellaneous May be harder than glass in places Metamorphic Type Hydrothermal Metamorphic Grade Low Grade Parent
What is ERUP?
Geology1 : to send out lava, rocks, and ash in a sudden explosion The volcano erupted. 2 : to burst out in a sudden explosion Lava erupted from the volcano. 3 : to happen, begin, or appear suddenly War erupted. What is volcanic eruption Definition? A volcanic eruption is when lava and gas are released
What is the shape of a glacial valley?
GeologyValley glaciers carve U-shaped valleys, as opposed to the V-shaped valleys carved by rivers. During periods when Earth’s climate cools, glaciers form and begin to flow downslope. Often, they take the easiest path, occupying the low V-shaped valleys once carved by rivers. What is V-shaped valley? BSL Geography Glossary – V-shaped Valley – definition A