The following figure shows several different samples of sediments in optical microscope view. Which of the samples displays the BEST sorting?Click to view larger image.

Viscosity is a material’s resistance to flow. The pictures below show two types of volcanic eruptions. In the first, lava is fountaining and flowing freely, making a gently sloping volcano. In the second eruption, a thick plug of lava called a dome has emerged in a volcanic crater. Which of the following statements BEST describes the relative viscosity of these two eruptions?Click to view larger image.

Which of the following sedimentary environments would produce the more well-sorted sedimentary rocks

Which silicate mineral has a single-chain structure?

Sedimentary rocks that originated as deposits near the center of a large lake should have

A silica tetrahedron is composed of

In the following figure, the magnetic anomaly pattern is mirrored on either side of the central ridge. What is responsible for this pattern?Click to view larger image.

Maximum compaction can be achieved with:

The most important factor in the deposition of evaporite minerals in a marine basin is

The following four figures show several different tectonic settings where volcanism is active. Which of the following images shows a tectonic environment where magmas were produced by flux-melting?Click to view larger image.