Mt. St. Helens was a rather common explosive volcano. The “stratification” that creationists point to was the result of repetitive pyroclastic flows in a short period of time. Pinatubo had similar flows without the lahar mud flows causing “instant” erosion. St. Helens does nothing to advance the creationist arguements. Been there, seen that.
Well when we see all the same processes with fossils and archaeology worldwide, please do tell how you ‘know’ other event sites [Grand Canyon for instance] to be long ages v localized and more recent catastrophes? Actually no need to answer b/c there is no good explanation. Some of the rocks at Mt.Saint Helens had there atomic clocks reset and some did not where radio-isotope dating showed millions of years - again simply another argument where you have no logical nor reasonable explanations.