on September 24, 2022
What is abrasion in glacial erosion?
GeologyAsked by: Amanda Rogers As a glacier flows downslope, it drags the rock, sediment, and debris in its basal ice over the bedrock beneath it, grinding it. This process is known as abrasion and produces scratches (striations) in bedrock surface. What is a glacial abrasion? Glacial abrasion is the surface wear achieved by individual clasts,
on September 24, 2022
Is there a big earthquake coming to Alaska?
GeologyAsked by: Nora Johnson When did Alaska have a 7.1 earthquake? On November 30, 2018, at 8:29 a.m. AKST (17:29 UTC), a magnitude 7.1 earthquake hit Anchorage in South Central Alaska.2018 Anchorage earthquake. Damage to the Glenn Highway Local date November 30, 2018 Local time 08:29:28 AKST Magnitude 7.1 Mww Depth 46.7 km (29.0 mi)
on September 24, 2022
Where is the world’s water found?
GeologyAsked by: Donald Hands the oceans Where is the worlds water found? Earth’s water is (almost) everywhere: above the Earth in the air and clouds, on the surface of the Earth in rivers, oceans, ice, plants, in living organisms, and inside the Earth in the top few miles of the ground. Where does the world’s
on September 24, 2022
What does intrusive igneous mean?
GeologyAsked by: Kirk Wallace 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. What is the meaning of intrusive igneous rock? Intrusive, or plutonic, igneous rock forms when magma is trapped deep
on September 24, 2022
How do you determine cleavage?
GeologyAsked by: April Harris To determine the angle of cleavage, look at the intersection of cleavage planes. Commonly, cleavage planes will intersect at 60°, 90° (right angles), or 120°. Be cautious when you see a flat surface on a mineral – not every flat surface is a cleavage plane. How do you identify cleavage and
on September 23, 2022
What would you be most likely to find at a divergent boundary between two pieces of continental crust?
GeologyAsked by: Jay Betoch A divergent boundary occurs when two tectonic plates move away from each other. Along these boundaries, earthquakes are common and magma (molten rock) rises from the Earth’s mantle to the surface, solidifying to create new oceanic crust. The Mid-Atlantic Ridge is an example of divergent plate boundariesplate boundariesIf two tectonic plates
on September 23, 2022
How are U shaped and V shaped valleys formed?
GeologyAsked by: Suzanne Gerrans Valley glaciers carve U-shaped valleysU-shaped valleysU-shaped valleys, also called trough valleys or glacial troughs, are formed by the process of glaciation. They are characteristic of mountain glaciation in particular. How are U-shaped valleys formed simple? Glaciers cut distinctive U-shaped valleys , or troughs, with a flat floor and steep sides. The
on September 23, 2022
How did the Himalayan mountains form quizlet?
GeologyAsked by: Andy Singh The Himalayas were formed due to the collision between the Eurasian Plate and the Indian Plate. When Asia and Europe collided, subduction stopped because India could not sink into the mantle. Since it could not sink, the Indian Plate pushed the crust upward and also downward, because of this, the Himalayas
on September 23, 2022
What is the process which causes magma to form?
GeologyAsked by: Nicole Young Magma is created at mid-ocean ridges via decompression melting. Strong convection currents cause the solid asthenosphere to slowly flow beneath the lithosphere. The upper part of the lithosphere (crust) is a poor heat conductor, so the temperature remains about the same throughout the underlying mantle material. What causes magma to form?
on September 23, 2022
Why are the Appalachian mountains so important?
GeologyAsked by: Jesse Carmody The mountains have played an important role in the history and economic development of the United States. They formed a barrier that held the early settlers near the Atlantic coast until the colonies could develop the unity and strength to fight for independence and form a nation. What makes Appalachia unique?