Mr. Putter and his cat Tabby are excited to participate in a library read-aloud program, but they are nervous when Mrs. Teaberry and her unpredictable dog Zeke want to join. Despite Zekeâs antics, their fears are unfounded when they discover that the event is a success for all involved.
Correlating Rock Layers correlation is the matching of rock layers from one area to another. For example, a geologist might wish to know if a layer of limestone in NY is the same layer of limestone found in MI. Correlation can be useful because valuable minerals can be found in specific layers of rock, and if we can identify the same layer far away we might be able to exploit the resource over a large area.
Sedimentary rocks cover up to 75% of the Earth 's surface, record much of the Earth's history, and harbor the fossil record. Sedimentology is closely linked to stratigraphy, the study of the physical and temporal relationships between rock layers or strata. Typically, the majority of carbonate rocks are composed of reef material. 2  Evaporites are formed through the evaporation of water at the Earth's surface and most commonly include halite or gypsum. 3  Chemical sedimentary rocks, including some carbonates, are deposited by precipitation of minerals from aqueous solution.