Why does the continental crust rise higher than the oceanic crust?
Regional SpecificsThe less-dense continental crust has greater buoyancy, causing it to float much higher in the mantle. Its average elevation above sea level is 840 metres (2,750 feet), while the average depth of oceanic crust is 3,790 metres (12,400 feet). This density difference creates two principal levels of Earth’s surface. Why is the oceanic crust lower
Which is stronger magnitude or intensity?
Regional SpecificsMagnitude and Intensity measure different characteristics of earthquakes. Magnitude measures the energy released at the source of the earthquake. Magnitude is determined from measurements on seismographs. Intensity measures the strength of shaking produced by the earthquake at a certain location. Which is higher magnitude or intensity? Magnitude is a measure of earthquake size and remains
How many eras have there been?
Regional SpecificsTen eras are recognized by the International Union of Geological Sciences: the Eoarchean Era (4.0 billion to 3.6 billion years ago), the Paleoarchean Era (3.6 billion to 3.2 billion years ago), the Mesoarchean Era (3.2 billion to 2.8 billion years ago), the Neoarchean Era (2.8 billion to 2.5 billion years ago), the … What are
What are the effects of rockfall?
Natural EnvironmentsRockfall causes extraordinary amounts of monetary damage and death, the former mostly by impeded transportation and commerce due to blocked highways and waterways and the latter as direct casualties from falling rocks. What is formed as a result of a rockfall? What is formed as a result of a rockfall? A talus slope. A talus
What would happen if crater lake erupted?
Regional SpecificsThe largest explosions could produce pyroclastic surges, hot, rapidly moving clouds of gas and ash, which could move out a few miles from vents along the margin of the lake. Eruptions in deeper water are less likely to be explosive or affect areas around the rim. Is Crater Lake still an active volcano? Although considered
How big is an ammonite?
Regional SpecificsBased on the fossil record, ammonites came in a wide range of sizes and shapes, from smaller than an inch to as large as nine feet wide. Some ammonites had long, straight shells, while others had helix-shaped shells. How big was the biggest ammonite? 5.7 feet The largest ammonite fossil ever discovered belongs to the