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view source for geologic record wikipedia jump to content main menu main menu move to sidebar hide navigation main page contents current events random article about wikipedia contact us contribute help learn to edit community portal recent changes upload file special pages search search appearance donate create account log in personal tools donate create account log in view source for geologic record add languages article talk english read edit view history tools tools move to sidebar hide actions read edit view history general what links here related changes upload file page information get shortened url switch to legacy parser in other projects wikidata item appearance move to sidebar hide geologic record you do not have permission to edit this page for the following reason this ip address range has been globally blocked this does not affect your ability to read wikipedia pages most people who see this message have done nothing wrong some kinds of blocks restrict editing from specific service providers or telecom companies in response to recent abuse or vandalism and can sometimes affect other users who are unrelated to that abuse review the information below for assistance if you do not believe that you have done anything wrong this block affects editing on all wikimedia wikis the ip address or range 5 135 0 0 16 has been globally blocked by jon kolbert for the following reason s open proxy webhost visit the faq if you are affected this block will expire on 04 29 8 january 2027 your current ip address is 5 135 42 194 even while globally blocked you will usually still be able to edit pages on meta wiki if you believe you were blocked by mistake you can find additional information and instructions in the stewards block wizard other useful links global blocks help i have been blocked you can view and copy the source of this page discordant strata example image biostratigraphie usgs png thumb left usgs correlation diagram correcting for discordancies can be done in a number of ways and utilizing a number of technologies or field research results from studies in other disciplines in this example the study of layered rocks and the fossils they contain is called biostratigraphy and utilizes amassed geobiology and paleobiology paleobiological knowledge fossils can be used to recognize rock layers of the same or different age geology geologic ages thereby coordinating locally occurring stage geology geologic stages to the overall geologic time scale geologic timeline the pictures of the fossils of monocellular algae in this united states geological survey usgs figure were taken with a scanning electron microscope and have been magnified 250 times in the u s state of south carolina three marker species of fossil algae are found in a core of rock whereas in virginia only two of the three species are found in the eocene series geology series of rock layers spanning three stage geology stages and the geologic ages from 37 2 55 8 year si_prefix_multipliers ma comparing the record about the discordance in the record to the full rock column shows the non occurrence of the missing species and that portion of the local rock record from the early part of the middle eocene is missing there this is one form of discordancy and the means geologists use to compensate for local variations in the rock record with the two remaining marker species it is possible to correlate rock layers of the same age early eocene and latter part of the middle eocene in both south carolina and virginia and thereby calibrate the local rock column into its proper place in the overall geologic record geology to paleobiology none yes return to geologic record retrieved from https en wikipedia org wiki geologic_record privacy policy about wikipedia disclaimers contact wikipedia legal safety contacts code of conduct developers statistics cookie statement mobile view search search view source for geologic record add languages add topic