Most commonly, patients describe acute tenderness in the buttock and sciatica-like pain down the back of the thigh, calf and foot. Typical piriformis syndrome symptoms may include: 1  A dull ache in the buttock. 2  Pain down the back of the thigh, calf and foot (sciatica).
We think of ice as snowflakes, ice cubes, snow cones, and dangerous patches on the sidewalk. Scientists have many different ways of categorizing ice too! There are actually fourteen types of ice that exist in different environments.
Periglacial Processes: Ground Ice Surface soils and sediments in periglacial environment are frequently influenced by a variety of different types of ground ice. Some of these masses of ground ice can be as much as 30 meters across. The most common form of ground ice is pore ice.