How were the Koolau mountains formed?
GeologyKoolau Range, mountains paralleling for 37 miles (60 km) the eastern coast of Oahu island, Hawaii, U.S. The range was formed by volcanic eruptions and has an average width of 13 miles (21 km). How did the island of Oahu form? The Hawaiian Islands were formed by such a hot spot occurring in the middle
Is Mt St Helens a hot spot volcano?
GeologySt. Helens, include plug-dome elements, the oozing lava staying right above the vent. So, the major volcanoes for our purposes are the quiet, basaltic shield volcanoes of hot spots, the quiet basaltic rift volcanoes of spreading ridges, and the steep, scenic, explosive, andesitic volcanoes of the Ring of Fire. Is Mt St Helens hot spot?
How does Magma cool to form igneous rock?
GeologyThe magma, called lava when molten rock erupts on the surface, cools and solidifies almost instantly when it is exposed to the relatively cool temperature of the atmosphere. Quick cooling means that mineral crystals don’t have much time to grow, so these rocks have a very fine-grained or even glassy texture. How does a magma
What plate boundary caused the Soufriere Hills volcano?
Geologyconvergent plate boundaryconvergent plate boundary; where the Atlantic Plate is subducting under the Caribbean plate. In the plate tectonics, a convergent boundry is a deforming region where two (or more) tectonic plates of lithosphere move toward each other and collide.Soufriere Hills is formed by a convergent plate boundaryconvergent plate boundaryA convergent boundary (also known as
What are the different types of lava?
GeologyLavas, particularly basaltic ones, come in two primary types: pahoehoe (pronounced ‘paw-hoey-hoey”) and aa (pronounced “ah-ah”). Both names, like a number of volcanological terms, are of Hawaiian origin. A third type, pillow lava, forms during submarine eruptions. What are the 3 main types of lava? There are three basic types of magma: basaltic, andesitic, and
Do they still use the Richter scale?
GeologyEarthquakes were reported on the Richter scale, a mathematical formula invented by Caltech seismologist Charles Richter in 1935 to compare quake sizes. But no one uses the Richter scale anymore in the media or in science. What replaced the Richter scale? The Richter Scale It was replaced with the Moment Magnitude Scale, which records all
What can destroy fossils?
GeologyOnce buried, the fossil and surrounding rock might undergo extreme pressure and heat, and the fossils could melt. Once fossils are formed, they might be washed away by streams, moved by glaciers, carried by scavengers, or caught in rockslides. Weathering by wind, water, and sun can destroy a fossil by wearing it away. What can
How do Flute marks form?
GeologyFlute marks are made by strong eddies (vortices) in the current. These scour the underlying mud deeply at first, but then weaken and widen as they move on down current. In which direction was the current flowing which left these flute casts? (A. from left to right). What do Flute marks suggest? flute mark A
What type of rocks are found in the Blue Ridge region of Virginia?
GeologyThe Blue Ridge province is a mountainous belt stretching from Pennsylvania southwest to Georgia. The mountains are made of highly deformed metamorphic rocks of largely Precambrian ages. These include schists, gneisses, slates, and quartzites, and are extensively intruded by igneous bodies. What are the two basic types of rocks in the Blue Ridge? The Blue
What skills do you need to become a mineralogist?
GeologyBecoming a mineralogist requires at least a bachelor’s degree, usually in mineralogy, geology, or sometimes engineering. These programs focus on geology, chemistry, other sciences, and math. Some mineralogist jobs are posted as engineering positions. Is a mineralogist a geologist? Mineralogy is a subject of geology specializing in the scientific study of the chemistry, crystal structure,