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Full-Text Articles in Geophysics and Seismology
Play Doh Coring Sampler Teacher Guide, Beth Caissie
Play Doh Coring Sampler Teacher Guide, Beth Caissie
IPY STEM Polar Connections
Sediment cores are one of the most valuable types of samples for researchers who would like to learn about past climate or ecological changes. Cores can be retrieved from lakes, marshes, swamps, fields, and the ocean. The layers often reveal striking changes in color (see photos) reflecting changing sediment composition (i.e. more clay deposition or more microfossil s). This easy activity illustrates the basic geologic principle that horizontal layers of sediment become older the deeper you go below the Earth’s surface (Law of Superposition). Each layer contains sediment, fossils and organic matter etc. that can inform us about past changes …