2007-08-25 02:33:34 · 4 answers · asked by secret 1 in Science & Mathematics ➔ Earth Sciences & Geology
This is usually in the realm of Structural Geology. A Field Geologist will look at cross-cutting relationships and determine a reasonable sequence. Included are the original (sedimentary) stratigraphy, non-conformities, igneous intrusions, faulting, folding, and other field relationships. In areas of high-grade metamorphic processes these processes can become challenging. Like TheRockLady said: it can be a puzzle.
2007-08-25 06:56:29 · answer #1 · answered by Amphibolite 7 · 1⤊ 0⤋
By the orientation and truncation of sedimentary rock layers.
2007-08-25 02:49:48 · answer #2 · answered by Anonymous · 0⤊ 0⤋
"The intelligent layman has long suspected circular reasoning in the use of rocks to date fossils and fossils to date rocks. The geologist has never bothered to think of a good reply"
(J. O'Rourke in the American Journal of Science).
2007-08-25 05:29:07 · answer #3 · answered by Anonymous · 0⤊ 2⤋
superposition is the technical term. it is described in detail in your geology book. like putting together a puzzle - the problems are fun!
2007-08-25 04:36:12 · answer #4 · answered by TheRockLady 4 · 1⤊ 0⤋