What are dropstones, and what do they indicate? What will be an ideal response?
Dropstones are gravel- to boulder-sized rocks found in otherwise fine-grained glacial lake deposits.
They indicate transport of the rocks into the lake by icebergs that eventually melted, releasing the
coarser sediment
You might also like to view...
Earthquake A is classified as a 3 on the Richter Scale. Earthquake B is classified as a 6. How many times more energy has Earthquake B released than Earthquake A?
A) 3 times B) 96 times C) 1,000 times D) 33,000 times
Early towns were usually built
A. near rich farmland. B. near rivers, lakes, and oceans. C. near railway centers. D. None of these are correct.
The World Bank ________
A) regulates U.S. environmental administrative agencies B) assists U.S. corporations to circumvent foreign nations' environmental laws C) is a major source of funds for global economic development D) is a U.S. NGO that funds any project that may affect global environment E) mandates that environmental law preempt all other federal laws
Acid mine drainage can result from the oxidation of _____
a. pyrite (FeS2) b. calcium carbonate (CaCO3) c. phosphorus (P) d. nitrogen (N) e. quartz (SiO2)