Correlation of rock units between continents or widely separated areas is accomplished by using physical features such as colour, texture, and thickness of units.

Question

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Correlation of rock units over large distances or between continents is primarily accomplished through the use of fossils (biostratigraphy), radiometric dating, and the study of the rock's mineral composition and structure, rather than relying solely on physical features like color, texture, and thickness, which can be highly variable and misleading.

Correlation of Rock Units Between Continents or Widely Separated Areas