DENDROCHRONOLOGY EXTINCTIONS APPEARANCE OF SPECIES HYDROSPHERE GEOSPHERE RADIOMETRIC DATING ICE CORES inform about experiences FOSSILS applying methods such as can be DATING ROCKS RELATIVE according to STRATIGRAPHIC CORRELATION CROSS-CUTTING RELATIONSHIPS SUPERPOSITION OF STRATA affect the inform about are preserved in occurred during GEOLOGIC TIME can be is divided into spans more than EONS 4,500 Ma GRADUAL CATASTROPHIC GEOLOGICAL PROCESSES ATMOSPHERE BIOSPHERE CHANGES provides information about the age of ABSOLUTE STRATIGRAPHIC PRINCIPLES EARTH are divided into ERAS are divided into PERIODS