on April 15, 2022
What are the tectonic plates made of?
GeologyA tectonic plate (also called lithospheric plate) is a massive, irregularly shaped slab of solid rock, generally composed of both continental and oceanic lithosphere. Plate size can vary greatly, from a few hundred to thousands of kilometers across; the Pacific and Antarctic Plates are among the largest.5 мая 1999 What type of rock are tectonic
on April 15, 2022
Is dolomite a igneous rock?
GeologyLike calcite, dolomite occurs in virtually all geologic settings in igneous rocks as carbonatite, in metamorphic rocks as marble, and in hydrothermal deposits. Also like calcite, the most abundant occurrences are in sedimentary rocks; rocks composed primarily of dolomite are sometimes referred to as dolostone. What type of rock is dolomite? Description. Dolomite rock is
on April 15, 2022
What caused most of the destruction associated with the eruption of Nevado del Ruiz?
GeologyOddly enough, the actual eruption of Nevado del Ruiz didn’t cause most of the destruction. It was caused not by lava but by the towering walls of sliding mud created when large chunks of hot ash and pumice mixed with melted snow. What was the damage of Nevado del Ruiz? The lahars destroyed everything in
on April 15, 2022
How are mineral replacement fossils formed?
GeologyFossils form through the process of mineral replacement beginning when an organism dies and is buried. Groundwater seeps around the organism, and the minerals in the water gradually replace the minerals in the hard parts of the organism. Over time these minerals turn into a stone replica of an organism. How are replacement fossils formed?
on April 15, 2022
What is Repetti discontinuity?
GeologyThe discontinuity between the upper mantle and the lower mantle is known as Repetti Discontinuity. The portion of the mantle which is just below the lithosphere and asthenosphere, but above the core is called as Mesosphere. What is Gutenberg discontinuity in geography? The Gutenberg discontinuity occurs within Earth’s interior at a depth of about 2,900
on April 15, 2022
What does Druzy mean in jewelry?
GeologyDruzy or sometimes referred to drusy, druse, or druze or aura quartz is most well known as versions of agate and quartz. Quartz is one of my favorite stones to work with because it is so versatile and comes in so many difference types, shapes, and colors. How can I tell if my druzy is
on April 15, 2022
What is the gangue in chemistry?
GeologyA gangue in chemistry can be defined as an unwanted material or impurities in the form of sand, rock or any other material that surrounds the mineral in an ore deposit. This substance is common when it comes to the aspect of mining. What is called gangue? In mining, gangue (/ɡæŋ/) is the commercially worthless
on April 15, 2022
What is the Indo Australian plate made of?
GeologyThe Indo-Australian Plate is a major tectonic plate that includes the continent of Australia and surrounding ocean, and extends northwest to include the Indian subcontinent and adjacent waters. It was formed by the fusion of Indian and Australian plates approximately 43 million years ago. What type of crust is the Indo-Australian Plate made from? oceanic
on April 15, 2022
How does relative and absolute dating were used to determine the subdivisions of geologic time?
GeologyAbsolute dating involves determining a rock’s actual age as a number of years, whereas relative dating methods provide an estimate of the age of a rock by comparing it to rocks of a known age The Geological Time Scale has been created by combining both absolute and relative dating methods. How relative and absolute dating
on April 15, 2022
What did Nicolaus Steno discover?
GeologySteno was the first to realize that the Earth’s crust contains a chronological history of geologic events and that the history may be deciphered by careful study of the strata and fossils. He rejected the idea that mountains grow like trees, proposing instead that they are formed by alterations of the Earth’s crust. What is