Possession Point is a cape in Island, Washington. Possession Point is situated nearby to the hamlet Glendale, as well as near the neighborhood Picnic Point.
Minerals of the Tower Hill Quarries, Snohomish County, Washington, USA (washingtonminerals.com) Mount Persis Andesite - Tertiary. Hydrothermally altered andesite, varying in color from gray (less altered) to yellow, red and brown where heavily altered. Voids created by faulting and brecciation have been partially/completely filled by hydrothermal mineralization.