Question: What was a mountain building period that ended 440 million years ago, that durring this time a unit of interbedded greywackes and shales that outcrops in eastern New York State were deposited in a deep marine setting in a foreland basin during this time? 
Sentence (from "Naukluft Mountains"): The sediments are equivalent in age to the Otavi Mountainlands sediments where evidence for snowball earth climates was described by Paul F. Hoffman.
Relevant evidence: No