Wilson Stream Inlet In the core in S.E. 1,52,6, on the west side of Wilson Stream appear some fragiliferous gray- white rhyolites somewhat mac- erated. These are overlain by a purplish to purple red porphyry which is usually hard & glassy, frequently softer & occasionally contains scattered fragments then resembling a tuff. A gray rhyo- lite porphyrite seems to intrude this, but possibly is brought up by faulting. The massive purple rhyo- lites are overlain by bedded purplish tuffs. These latter, about 20 feet thick are exposed at the outlet of Meadow Brook and underly the fossiliferous sed- iments which crop out farther up Wilson Stream.