Fossil Forrests

I’m wondering how YE geology explains the fossils forests of Yellow Stone National Park?

“That is to say, after the first forest grew and was entombed, there was a time without volcanic outburst—a period long enough to permit a second forest to grow above the first. This in turn was covered by volcanic material and preserved, to be followed again by a period of quiet, and these more or less regular alternations of volcanism and forest growth continued throughout the time the beds were in process of formation.”
http://www.nps.gov/history/history/online_…owlton/sec1.htm

“Evidence from stratigraphic relationships and petrographic analyses indicates that most upright tree stumps at Specimen Ridge in Yellowstone National Park were buried in place. These stumps are commonly rooted in a fine-grained tuffaceous sandstone that shows no petrographic evidence of being deposited by current action; in fact, most sandstones have textures resembling immature soils. Conglomerates that overlie these root-zone sandstones flow around and bury the vertical trunks. Trees were apparently killed in place by either mudflows or rising lake waters, giving rise to discontinuous, localized clusters of preserved trees in a given stratigraphic interval. However, the episodic nature of mudflow sedimentation indicates that these stacked clusters are likely remnants of successive forests with enough time between them to allow for incipient soil development.”
http://geology.geoscienceworld.org/cgi/con…stract/12/3/159

This is a beautiful illustration of modern geology incorporating both gradual and rapid process’ – each fossil forest represents a period of calm during which an entire forest gradually developed only to be successively obliterated and buried by volcanic fallout. Each of these catastrophic events was then followed by another period of calm during which another forest grew.