When did Mt Lassen last erupt?
GeologyWill Mount Lassen erupt again? Q: Will Lassen Peak erupt again and if so, when? A: No one can say for sure or when. However, Lassen Peak is considered active because it last erupted about 100 years ago (read more). Geologically recent volcanic activity in an area is the best guide to forecasting future eruptions.
Can diamond be found in rocks?
GeologyThe diamond is the hardest natural substance known. It is found in a type of igneous rock known as kimberlite. The diamond itself is essentially a chain of carbon atoms that have crystallized. The stone’s unique hardness is a result of the densely concentrated nature of the carbon chains. What rocks can contain diamonds? kimberlite,
What method provides the most accurate estimate of a fossils age?
GeologyThe age of fossils is determined by figuring out the age of the rock in which the fossil is found. The most accurate method is radiometric dating…. What do homologous structures vestigial structures and fossils provide evidence of *? Multiple types of evidence support the theory of evolution: Homologous structures provide evidence for common ancestry,
What is the most dangerous volcanic hazard?
GeologyTephra, lahars and tsunami become the dominant fatal causes for incidents and fatalities after about 15 km (Fig. 4). Tephra fall is commonly the most widespread volcanic hazard (Jenkins et al. What hazards make volcanoes so dangerous? Several hazards may affect the area around the volcano, such as lava flows, pyroclastic flows, lahars, jökulhlaups and
What are the properties of minerals?
GeologyMost minerals can be characterized and classified by their unique physical properties: hardness, luster, color, streak, specific gravity, cleavage, fracture, and tenacity. What are the 5 properties for minerals? Minerals can be identified by their color, luster, streak, cleavage, hardness, and even by their chemical composition. What are the 10 mineral properties? These include: color,
What mineral is transparent?
Geologycalcitecalcite is transparent, while the gypsum is translucent and the gold is opaque. Judging how a mineral transmits light is a good step in identifying your specimen. What is an example of a transparent mineral? Typical examples of transparent or clear gems are: Rock crystal quartz. Fine quality diamond. Corundum. Which minerals are transparent to
What type of weathering causes the formation of soil?
GeologySoils develop because of the weathering of materials on Earth’s surface, including the mechanical breakup of rocks, and the chemical weathering of minerals. Soil development is facilitated by the downward percolation of water. What weathering causes soil formation? The physical and chemical weathering processes that change parent material into soil include: Temperature changes — freezing
When was Harry Hess born?
GeologyWhen did Harry Hess come up with his theory? 1962 In 1962, he proposed a groundbreaking hypothesis that proved vitally important in the development of plate tectonic theory. It addressed several geologic puzzles: If the oceans have existed for at least 4 billion years, why has so little sediment accumulated on the ocean floor? Where
Is Basalt a good building material?
GeologyLately, basalt fibre has attracted attention as a possible construction material due to its properties such as high modulus of elasticity, high elastic strength, corrosion resistance, high-temperature resistance, extended operating temperature range and ease of handling. Can you build with basalt? Today, basalt is commonly used as crushed aggregate in construction projects. Crushed basalt is
What was the 2011 Japan tsunami called?
Geology2011 Tohoku Earthquake and TsunamiGreat East Japan earthquake and tsunami, resulted in over 18,000 dead, including several thousand victims who were never recovered.Mar 11, 2021 Which tsunami was the biggest? A notable exception was the 1958 tsunami triggered by a landslide in a narrow bay on Alaska’s coast. Its over 1,700-foot wave was the largest