Geosciences
Scientists gain supervolcano insights from Wyoming granite Geophysical monitoring of the ground above active supervolcano shows that it rises and falls as magma moves beneath the surface of Earth. Silica-rich … Read More
Sedimentary rock is formed at or near the Earth’s surface by the accumulation and lithification of sediment (detrital rock) or by the precipitation from solution at normal surface temperatures (chemical … Read More
With few exceptions, the ground collapses that constitute the karst geohazard in engineering activity in limestone terrains are induced by human activity. Subsidence sinkholes, formed entirely within the soil profile, … Read More
What once had been plants gradually turned into coal. Millions of years ago, dead plant matter fell into swampy water and over time, a thick layer of dead plants lay … Read More
Write a statement describing how spreading rates affect ridge topography. The greatest volume of magma (more than 60 percent of Earth’s total yearly output) is produced along the oceanic ridge … Read More
Explain how rocks of similar age that are in different places can be matched up. To develop a geologic time scale that is applicable to the entire Earth, rocks of … Read More
Distinguish among three broad categories of sedimentary environments and provide an example of each. List several sedimentary structures and explain why these features are useful to geologists. Sedimentary rocks are … Read More
The first mention of contact metamorphism/metamorphic phenomena dates back to the end of the eighteenth century when James Hutton observed that, the rocks surrounding a granitic body at Glen Tilt … Read More
Identify and describe the six major igneous textures. The term texture is used to describe the overall appearance of a rock based on the size, shape, and arrangement of its … Read More
Describe how magmatic differentiation can generate a body that has mineralogy (chemical composition) that is different from its parent magma. Geologists have observed that, over time, a volcano may extrude … Read More