Figure 3. Subsurface records from observation wells and test borings provide the most detailed information shown on the materials maps. The following examples show how to read the abbreviated logs:

minimum depth to bedrock is 112 feet (the test boring did not reach bedrock); starting at the surface, the surficial materials at this point consist of 16 feet of sand and silt over 1 foot of gravelly sand over 80 feet of sand, silt, and clay over 8 feet of sand over 7 feet of sandy-matrix diamicton

depth to bedrock is 87 feet (the test boring reached bedrock); starting at the surface, the surficial materials at this point consist of 3 feet of sand over 29 feet of clay over 45 feet of sand over 10 feet of sand and gravel over rock

---

Last updated on October 6, 2005

Maine.gov | Department of Conservation | MGS Home | Site Policies