on March 31, 2022
What are intrusive volcanic features?
GeologyIntrusive features like stocks, laccoliths, sills, and dikes are formed. If the conduits are emptied after an eruption, they can collapse in the formation of a caldera, or remain as lava tubes and caves. The mass of cooling magma is called a pluton, and the rock around is known as country rock.Feb 10, 2020 What
on March 31, 2022
Is the Cocos plate convergent or divergent?
GeologyIs the Cocos Plate convergent or divergent or transform? The northern boundary of the Cocos Plate is the Middle America Trench. The eastern boundary is a transform fault, the Panama Fracture Zone. The southern boundary is a mid-oceanic ridge, the Galapagos Rise. The western boundary is another mid-ocean ridge, the East Pacific Rise. What type
on March 31, 2022
Was there just an earthquake in the Inland Empire?
GeologyWas there an earthquake just now Rancho Cucamonga? today: 1.8 in Lucerne Valley, California, United States. this week: 1.8 in Lucerne Valley, California, United States. this month: 3.3 in Rancho Cucamonga, California, United States. Was there an earthquake just now CA? today: 2.8 in Cobb, California, United States. this week: 3.7 in Williams, California, United
on March 31, 2022
How do you explain the rock cycle?
GeologyThe rock cycle is a concept used to explain how the three basic rock types are related and how Earth processes, over geologic time, change a rock from one type into another. Plate tectonic activity, along with weathering and erosional processes, are responsible for the continued recycling of rocks. How do you explain the rock
on March 31, 2022
What is karst topography and how is it formed?
GeologyKarst is a topography formed from the dissolution of soluble rocks such as limestone, dolomite, and gypsum. It is characterized by underground drainage systems with sinkholes and caves. It has also been documented for more weathering-resistant rocks, such as quartzite, given the right conditions. What is called karst topography? [ kärst ] A landscape that
on March 31, 2022
What is the difference between Volcano and volcanism?
GeologyWhat is the difference between volcanism and a volcano? A volcano is a vent or a fissure in the crust from which lava (molten rock), ash, gases, rock fragments erupt from a magma chamber below the surface. Volcanism is the phenomenon of eruption of molten rock, pyroclastics and volcanic gases to the surface through a
on March 31, 2022
What is intensity of an earthquake?
GeologyThe intensity is a number (written as a Roman numeral) describing the severity of an earthquake in terms of its effects on the earth’s surface and on humans and their structures. Several scales exist, but the ones most commonly used in the United States are the Modified Mercalli scale and the Rossi-Forel scale. What is
on March 31, 2022
What is the name of the fault line on the East Coast?
GeologyThe east coast of the United States is home to the Ramapo Fault Zone. Spanning more than 185 miles (298 km), this fault system runs between the northern Appalachian Mountains and the Piedmont region to the east. Along this fault zone is a remarkably straight magnetic line that runs between New York and Alabama along
on March 31, 2022
What is a volcano and how is it formed?
GeologyA volcano is formed when hot molten rock, ash and gases escape from an opening in the Earth’s surface. The molten rock and ash solidify as they cool, forming the distinctive volcano shape shown here. As a volcano erupts, it spills lava that flows downslope. Hot ash and gases are thrown into the air. What
on March 31, 2022
What happened during the Archean era?
GeologyDuring the Archean Eon, methane droplets in the air shrouded the young Earth in a global haze. There was no oxygen gas on Earth. Oxygen was only in compounds such as water. Complex chemical reactions in the young oceans transformed carbon-containing molecules into simple, living cells that did not need oxygen to live. What life