What part of a glacier moves the fastest?
GeologyThe ice in the middle of a glacier flows faster than the ice along the sides of the glacier. What part of the glacier flows the fastest Why? When the lower ice of a glacier flows, it moves the upper ice along with it, so although it might seem from the stress patterns (red numbers
What is the biggest crystal?
GeologyThe largest authenticated crystal of any type is a beryl from Malakialina, Malagasy Republic, being 18 m in length, 3.5 m in diameter, having a volume estimated at 143 m3 and a mass approximately 380,000 kg. Where is the largest crystal in the world? The World’s Largest Crystals Are Growing in a Cave in Mexico
How are seismometers used to detect earthquakes?
GeologySeismometers allow us to detect and measure earthquakes by converting vibrations due to seismic waves into electrical signals, which we can then display as seismograms on a computer screen. Seismologists study earthquakes and can use this data to determine where and how big a particular earthquake is. How do seismometers work? An instrument sensitive to
How many earthquakes are there in a day?
GeologyEarthquakes are always happening somewhere, and the National Earthquake Information Center locates about 12,000-14,000 earthquakes each year. On average, earthquakes of magnitude 2 and smaller occur several hundred times a day worldwide, while large earthquakes of magnitude 7 and larger occur more than once a month. The National Earthquake Information Center now locates about 20,000
Why do small rocks weather more quickly?
GeologyLarge rocks have less surface area for their volume than small rocks. Therefore, a smaller portion of the rock is exposed to weathering. It takes longer for the rock to wear away. The small rock has more surface area for its vol- ume, so it weathers away faster. What type of rocks weather more easily?
Where are trace fossils found?
GeologyTrace fossils are best preserved in sandstones; the grain size and depositional facies both contributing to the better preservation. They may also be found in shales and limestones. Where can you find a trace fossil? Trace fossils most often were created in soft sediments, and are usually preserved only if the sediment remains undisturbed until
What causes foliation in metamorphic rocks?
GeologyFoliated Metamorphic Rocks: Foliation forms when pressure squeezes the flat or elongate minerals within a rock so they become aligned. These rocks develop a platy or sheet-like structure that reflects the direction that pressure was applied. What causes foliation to occur? Foliation is caused by the re-alignment of minerals when they are subjected to high
What are metal ores used for?
GeologyThe most valuable ore deposits contain metals crucial to industry and trade, like copper, gold, and iron. Copper ore is mined for a variety of industrial uses. Copper, an excellent conductor of electricity, is used as electrical wire. Copper is also used in construction. Why are metal ores so valuable? Why are ores so valuable?
What are the 4 eons of the geologic time scale?
GeologyFor example, the entire age of the earth is divided into four eons: the Hadean Eon, the Archean Eon, the Proterozoic Eon, and the Phanerozoic Eon. These four eons are further subdivided into eras (Table 7.3). What are the 4 divisions of the geologic time scale in order? The geologic time scale is divided into
Has anyone died from Kilauea?
GeologyAn elderly man has died after falling into Hawaii’s Kilauea Volcano, according to authorities. “A 75-year-old Hilo man died after falling from a closed area within HawaiĘ»i Volcanoes National Park late Sunday night,” the National Park Service said in a statement shared on Monday. How many deaths has Kilauea caused? Volcanic eruptions Human death toll