on April 14, 2022
What is a sequence boundary?
GeologySequence boundary (SB) A sequence boundary is a surface formed by subaerial exposure that occupies a sequence-bounding position between an underlying RST and an overlying TST. What is type 1 sequence boundary? type 1 sequence boundary (SB1) It is interpreted to form when the rate of eustatic fall exceeds the rate of basin subsidence at
on April 14, 2022
How is scoria formed?
GeologyMagma containing abundant dissolved gas flows from a volcano or is blown out during an eruption results in the formation of scoria. If molten rock solidifies before the gas escapes, the bubbles become small rounded or elongated cavities, which leads to scoria being produced. Where are pumice and scoria formed? Scoria and pumice are both
on April 14, 2022
What state of matter is lithosphere?
GeologyThe lithosphere is the solid, outer part of the Earth. Are lithosphere solid or liquid? solid Lithosphere: includes the crust and upper mantle. Is composed of a rigid solid. Asthenosphere: lower mantle, composed of “plastic solid” akin to playdoh. Outer core: liquid. Is the lithosphere semi liquid or solid? The outermost physical layer is the
on April 14, 2022
How are seafloor features formed?
GeologyAs plates converge, one plate may move under the other causing earthquakes, forming volcanoes, or creating deep ocean trenches. Where plates diverge from each other, molten magma flows upward between the plates, forming mid-ocean ridges, underwater volcanoes, hydrothermal vents, and new ocean floor crust. What is a sea floor feature? Seafloor Features. Seafloor Features Name:________________________________
on April 14, 2022
What are the 3 techniques used for surface mining and what are the environmental dangers of each?
GeologyWhat are the 3 types of surface mining? surface mining, method of extracting minerals near the surface of the Earth. The three most common types of surface mining are open-pit mining, strip mining, and quarrying. What are three 3 effects of mining on the environment? Mine exploration, construction, operation, and maintenance may result in land-use
on April 14, 2022
What are the three stages in order of a tsunami?
GeologyThe life of a tsunami is usually divided into three phases: the generation (tsunami source), the propagation and the inundation. Each phase is complex and often described separately. What are the levels of tsunamis? There are four levels of tsunami alerts: warning, advisory, watch, and information statement. Each has a distinct meaning relating to local
on April 14, 2022
What is burial and compaction?
GeologyAs layers are piled one upon another, the sediments beneath are buried, sometimes by hundreds of metres of sediment above. The weight of these layers compacts (squashes down) the sediment grains. Minerals deposited from water in the spaces between the sediment grains gradually cements them together. What comes first compaction or burial? Summary. Compaction is
on April 14, 2022
What is the difference between clastic and non clastic sedimentary rocks?
GeologyIf you look closely, you can see grains of sand. From this distance, you can see different layers where the sand was deposited. This rock is sandstone. The grains of sand cemented together and formed sandstone. Sandstone is a common type of sedimentary rock.Types of Sedimentary Rocks The main types of sedimentary rocks are clastic
on April 14, 2022
Is Dolomite the same as marble?
GeologyDolomite has a more “stone gray” look than Marble’s clean white, often featuring gently moving pastel colors such as blue, pink, brown, and even green. The selection of colors in Dolomite has a greater variety than marble, with options ranging from white stones like Shadow Storm, to the popular Fantasy Brown.Sep 7, 2021 Is marble
on April 14, 2022
How was the big island formed?
GeologyThe Hawaiian Islands were formed by such a hot spot occurring in the middle of the Pacific Plate. While the hot spot itself is fixed, the plate is moving. So, as the plate moved over the hot spot, the string of islands that make up the Hawaiian Island chain were formed. When was the Big