PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT PUBLICATION_DATE = 2009-11-15 NOTE = "Sample context description" END_OBJECT = TEXT END Chunky, angular palagonitic clast-rich non-layered "Vein" of ash cuts across ash layers, in the northeast wall of Fort Rock Tuff Ring. Deposit is comprised primarily of tan sub-resultion ash, with light and dark gray to black lithics interspersed.