Sub-bottom Acoustic Profiling Sled
A sub-bottom acoustic profiling sled was towed behind the research vessel to map the thickness of moss sediments around Wizard Island.
U.S. Geological Survey
When living moss dies it forms peat sediments. The peat sediments are located under presently growing moss and can be 10 meters (30 feet) thick in some places!
Did You Know?
The "Old Man" of Crater Lake is a mountain hemlock log that has been floating upright in the lake for more than 100 years! Wind currents enable the Old Man to travel to different locations around the lake.