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#camanoisland — Public Fediverse posts

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  1. Rock on the beach at Barnum Point, Camano Island, WA. Conglomerate with subrounded cherty clasts in a dark matrix. Any sedimentary petrologists? Likely weathered out of till that caps the bluffs or a dropstone from floating ice on marine water incursion during the Everson interstade. Source rock provenance not known. Ref. Geologic map of the Juniper Beach 7.5-minute quadrangle, WDGER Geologic Map GM70. #geology #sedimentary #conglomerate #iceage #glaciation #PNW #washingtonstate #CamanoIsland

  2. Rock on the beach at Barnum Point, Camano Island, WA. Looks like a granodiorite peppered with xenoliths. Igneous petrologists chime in. Likely weathered out of the till that caps the bluffs or a dropstone from floating ice on marine water incursion during the Everson interstade. Source rock provenance not known. Ref. Geologic map of the Juniper Beach 7.5-minute quadrangle, WDGER Geologic Map GM70. #geology #igneous #xenolith #iceage #glaciation #intrusive #PNW #washingtonstate #CamanoIsland