Is mafic lava explosive?
Regional SpecificsIn general, the more felsic the magma the greater the volatile content. So mafic/basaltic volcanoes are fairly quiescent, intermediate/andesitic volcanic eruptions are moderately explosive, and felsic/rhyolitic volcanoes may be extremely explosive. What are the 5 types of volcanic eruptions? Types of eruptions Hydrothermal eruption. An eruption driven by the heat in a hydrothermal systems. …
Why do tectonic plates move GCSE?
Regional SpecificsOne explanation for plate movements is slab pull. Plates are extremely heavy so gravity acts upon them, pulling them apart. Alternatively, as shown in the diagram, convection currents under the Earth’s crust transfer heat, which rises through the surface and cools back down in a circular motion. Why do tectonic plates have to move? The
What is granite boulder?
Regional SpecificsWhat is a granite boulder? Angular boulders that seem to have tumbled off the craggy peaks of the Sierra Nevada mountain range. The cornerstone of landscape design, boulders are large landscape rocks that are at least a foot across and can weigh 165lbs per cubic foot. … How do you define Boulder? : a detached
What is the highest rank of sedimentary coal?
Regional SpecificsThe four ranks are: Anthracite: The highest rank of coal. It is a hard, brittle, and black lustrous coal, often referred to as hard coal, containing a high percentage of fixed carbon and a low percentage of volatile matter. Bituminous: Bituminous coal is a middle rank coal between subbituminous and anthracite. What is the highest
What are the 3 types of fossils?
Regional SpecificsScientists categorize fossils into three main groups – impression fossils, trace fossils, and replacement fossils. What are the 3 major ways fossils are formed? Fossils form in five ways: preservation of original remains, permineralization, molds and casts, replacement, and compression. What are the 4 main types of fossils? True form, cast, mold, and trace fossils.
What is the geologic origin of Florida?
Regional SpecificsGeologists estimate the age of the Earth at more than 4.5 billion years. The Florida plateau, which is the platform upon which Florida is perched, was formed about 530 million years ago by a combination of volcanic activity and marine sedimentation during the early Ordovician Period. What is the major rock formation in Florida and