When did the Cenozoic Era began and end?
Regional SpecificsThe Cenozoic era began about 65 million years ago and continues into the present. How long did the Cenozoic Era last? about 65 million years The Cenozoic Era is the most recent of the three major subdivisions of animal history. The other two are the Mesozoic and Paleozoic Eras. The Cenozoic spans only about 65
Why are there many earthquakes on the Big Island of Hawaii?
Regional SpecificsThousands of earthquakes occur every year in the State of Hawaii. They are caused by eruptive processes within the active volcanoes or by deep structural adjustments due to the weight of the islands on Earth’s underlying crust. Thousands of earthquakes occur every year in the State of Hawaii. Why does the Big Island of Hawaii
What causes a basin and range?
Regional SpecificsThe basins (valleys) and ranges (mountains) are being created by ongoing tension in the region, pulling in an east-west direction. Over most of the last 30 million years, movement of hot mantle beneath the region caused the surface to dome up and then partially collapse under its own weight, as it pulled apart. What type
Is volcanic breccia felsic or mafic?
Regional SpecificsBecause tuffs and breccias require lots of ash to form, most tuffs and breccias are intermediate or felsic in composition. What rock type is breccia? Breccia Type Sedimentary Rock Texture Clastic; Coarse-grained (2 – 64 mm) Composition Quartz, Feldspar, Lithics Color Reddish brown Miscellaneous Angular clasts in a fine- to medium-grained matrix; Immature Is volcanic
What landforms do strike slip faults created?
Regional SpecificsStrike-slip faults, which are among the straightest and longest geologic features on Earth, are often identified by their geomorphic expression, including hallmarks such as offset rivers, shutter ridges, sag ponds, and linear, strike-parallel valleys [e.g., Wallace, 1949; Hill and Dibblee, 1953]. What do strike-slip faults create? These faults are caused by horizontal compression, but they
Is coal ash really toxic?
Regional SpecificsCoal ash is incredibly dangerous. Short-term exposure can bring irritation of the nose and throat, dizziness, nausea, vomiting, and shortness of breath. Long-term exposure can lead to liver damage, kidney damage, cardiac arrhythmia, and a variety of cancers. What is coal ash and why is it dangerous? Coal ash contains contaminants like mercury, cadmium and