What Is the Difference Between a History and a Stratosphere?

A stratum and a history are both channels of information flow. They preserve information because, although their contents change overtime, they are approximately autonomous. It is because of that autonomy that a fossil found to day can be used as evidence of what was present when that stratum was formed. A stratum, like a history, has no ate existence over and above the objects in it. Nor does the stratum have well defined edges. Also, there are regions of the earth, for instance, near volcanoes where strata have merged,. Although i think there are no geological processes that split and remerge strata in the way the histories split and reemerge.