on April 15, 2022
Why is Mount Pinatubo famous?
Regional SpecificsPinatubo is most notorious for its VEI-6 eruption on June 15, 1991, the second-largest terrestrial eruption of the 20th century after the 1912 eruption of Novarupta in Alaska. Complicating the eruption was the arrival of Typhoon Yunya, bringing a lethal mix of ash and rain to towns and cities surrounding the volcano. What is interesting
on April 15, 2022
What are the two major groups of minerals?
Regional SpecificsAll minerals, however, can be classified into two main groups—silicate minerals and nonsilicate minerals—based on the chemical compositions of the minerals. What are the major groups of minerals? Silicates, oxides, sulfates, sulfides, carbonates, native elements, and halides are all major mineral groups. Silicates. Oxides. Sulfates. Sulfides. Carbonates. Native Elements. Halides. What are the two main
on April 15, 2022
Why did mount okmok erupt?
Regional SpecificsA strong explosive eruption at Okmok began abruptly at 1143 on 12 July after about an hour of rapidly escalating earthquake activity. Ash and gas from the initial explosions reached at least 15 km (50,000 ft) a.s.l on 12 July and drifted as a large cloud S and E above the North Pacific. What caused
on April 15, 2022
Do earthquakes occur before volcano erupts?
Regional SpecificsA few large regional earthquakes (greater than magnitude 6) are considered to be related to a subsequent eruption or to some type of unrest at a nearby volcano. However, volcanoes can only be triggered into eruption by nearby tectonic earthquakes if they are already poised to erupt. Do earthquakes precede volcanic eruptions? “Volcanic eruptions are
on April 15, 2022
What type of rock is best for absolute dating?
Regional SpecificsIgneous rocks are the best types of rock samples to use for radiometric dating. When igneous rock forms, elements are separated into different minerals in the rock. Thus, when they form, minerals in igneous rocks often contain only a parent isotope and none of the daughter isotope. Which type of rock dating is used to
on April 15, 2022
What does compaction and cementation mean?
Regional SpecificsCompaction is when deposited sediments are smooshed together by the weight of water and other sediment that has settled on top of it. Cementation is when the sediments are glued together by the minerals that come out of supersaturated water. What does compaction and cementation mean in the rock cycle? Compaction is the squeezing of