On S Akron Road at Severyns Avenue, on the right when traveling east on S Akron Road.
The David Johnston memorial rock is a "bread-crusted" block from the deposit of an andesitic pyroclastic flow (hot avalanche of rocks, ash and gas) that descended the southwest flank of Mount St. Helens between 450 and 500 years ago and extended as . . . — — Map (db m302314) HM
On S. Akron Road at Severyns Avenue on S. Akron Road.
This boulder was collected in the Ross Sea during the 1984 research cruise of the USGS ship S.P. Lee It was dredged at a depth of 2000 meters (6,500 feet) from the flank of Iselin Bank, the northern extension of a wide basement ridge 100 kilometers . . . — — Map (db m302310) HM
