Which best describes the main difference between shale and mudstone?

Which one of the following is NOT connected in any way with submarine, hot spring vents?

The gently sloping platform that extends seaward from shore, found along most coasts, is called ________.

Which product, related to coal formation, is a result of metamorphism?

Which best describes how an accretionary wedge forms?

Which of the following geologic materials would have the highest groundwater velocities and be least effective in removing unwanted pollutants from the water?

The 1991 Pinatubo eruption in the Philippines caused brilliantly colored sunrises and sunsets to be seen for the next few years. What caused this phenomenon?

A ________ denotes the purity of gold used in jewelry.

Which one of the following is NOT connected in any way with submarine, hot spring vents?

When water moves in nearly straight-line paths parallel to the stream channel, in slow moving streams, this is called ________.