on April 16, 2022
Does Tahoe get earthquakes?
GeologyIn Lake Tahoe, there are three faults running north to south and have varying degrees of susceptibility to earthquakes. “The West Tahoe Fault is the most active,” Seitz said. Are earthquakes common in Tahoe? University of Nevada, Reno Seismological Laboratory Director Dr. Graham Kent began watching the basin carefully, unsure if these quakes are isolated
on April 16, 2022
What are the different eras of Earth?
GeologyThe Precambrian, Paleozoic, Mesozoic, and Cenozoic Eras The Geologic Time Scale is the history of the Earth broken down into four spans of time marked by various events, such as the emergence of certain species, their evolution, and their extinction, that help distinguish one era from another. What are the 6 eras of Earth? It
on April 16, 2022
How are gems different from minerals?
GeologyNew types of minerals are constantly being discovered within the earth’s surface. So minerals are crystals that make up different types of rocks and gemstones. Gemstones are usually minerals (but sometimes rocks) to which we give more value and that jewelers can make into something attractive. What is the difference between a gem and a
on April 16, 2022
Is Lava made out of rocks?
GeologyLava is molten rock. It is created deep beneath Earth’s surface (often 100 miles or more underground), where temperatures get hot enough to melt rock. Scientists call this molten rock magma when it’s underground. What’s lava made up of? Lava is made up of crystals, volcanic glass, and bubbles (volcanic gases). As magma gets closer
on April 16, 2022
What is Rodinia and Pannotia?
GeologyThe formation of Pannotia was the result of Rodinia turning itself inside out. When Pannotia had formed, Africa was located at the centre surrounded by the rest of Gondwana: South America, Arabia, Madagascar, India, Antarctica, and Australia. What were Rodinia and Pangaea? Rodinia was a supercontinent that preceded the more famous Pangea, which existed between
on April 16, 2022
What are the 6 types of fossils?
GeologyThere are 6 types of fossils. They are body, trace, cast and mold, living, s carbon film, and petrified wood. What are 6 ways fossils are formed? The five most often cited types of fossils are mold, cast, imprint, permineralization and trace fossils. Mold or Impression. A mold or impression fossil is formed when the
on April 16, 2022
What is a rock science?
GeologyTo geologists, a rock is a natural substance composed of solid crystals of different minerals that have been fused together into a solid lump. The minerals may or may not have been formed at the same time. What matters is that natural processes glued them all together. What is a rock easy definition? Definition of
on April 16, 2022
What happens at oceanic continental convergent plate boundary?
GeologyWhen oceanic lithosphere and continental lithosphere collide, the dense oceanic lithosphere subducts beneath the less dense continental lithosphere. An accretionary wedge forms on the continental crust as deep-sea sediments and oceanic crust are scraped from the oceanic plate. What happens at oceanic continental convergent boundaries? When oceanic crust converges with continental crust, the denser oceanic
on April 16, 2022
When those two continents split 65 million years ago what were formed?
GeologyWhen those two continents split 65 million years ago, what were formed? Part of molten rock at mid ocean ridges. Items they provide evidence that continents were once closer together. What were formed when Pangaea broke apart? About 200 million years ago Pangaea broke into two new continents Laurasia and Gondwanaland. Laurasia was made of
on April 16, 2022
What does downwelling cause?
GeologyDownwelling is where surface water is forced downwards, where it may deliver oxygen to deeper water. Downwelling leads to reduced productivity, as it extends the depth of the nutrient-limited layer. Upwelling occurs where surface currents are diverging, or moving away from each other. Does downwelling increase temperature? By Temperature Graphs: Bottom waters suddenly increase and