47+ Geologic History Of North America Timeline Images. Spreading, which originates at oceanic ridges, is. Mountain chain along w side of n.
After north america started shifting to the west 185 million years ago, away from africa and europe, the prevailing model placed a subduction zone along the west coast that consumed panthalassa's huge oceanic tectonic plate, the farallon plate. Naval stores and the longleaf pine. Geography statistics of north america.
(ma = millions of years ago).
University of california's museum of paleontology has created a hyperlinked geologic timeline with all sorts of details about each time unit that may be useful later in the course. University of california's museum of paleontology has created a hyperlinked geologic timeline with all sorts of details about each time unit that may be useful later in the course. While parts of the craton peek out in greenland and canada, in the u.s., thick layers of sedimentary rocks keep most of these ancient. Some descriptive information about the different divisions of geologic time is given below.