also give useful information pathways metamorphism pressure temperature space time stratigraphy different colors show different minerals composing mount ritagli di lecca seen fondachelli fantina sicily laboratory stratigraphers analyze samples stratigraphic sections returned field drill cores ref name hodell stratigraphers also analyze data geophysical surveys show locations stratigraphic units subsurface geophysical data well logs combined produce better view subsurface stratigraphers often use computer programs three dimensions stratigraphers
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