John Garver · @geo_garver
441 followers · 245 posts · Server mastodon.social
Turbidites above the Resurrection Peninsula Ophiolite, Alaska.
We now know that the turbidites on Fox Island, near Seward AK are part of the Paleocene Orca Group.
Spectacular in scale, and thickness.
#alaska #ophiolite #turbidite #paleocene #chugach
John Garver · @geo_garver
419 followers · 232 posts · Server mastodon.social
Pillow basalts of the 57 Ma Resurrection Peninsula Ophiolite, Alaska.
These are some of the most spectacular pillows I've seen.
These represent eruption of basaltic magma to the ocean floor, and they are directly related to the sheeted dike complex recently posted.
The Stellar sea lions have hauled out on a detached block with exposed flow tops.
#alaska #ophiolite #pillowbasalt #paleocene #chugach
John Garver · @geo_garver
395 followers · 222 posts · Server mastodon.social
Sheeted dike complex of the 57 Ma Resurrection Peninsula Ophiolite, Alaska.
We recently determined the age of this complex by dating zircons in sediment interbedded in the overlying pillows. One of the most spectacular sheeted dike complexes I've seen (...and difficult to access).
These are feeders for basaltic magma to reach and erupt to the ocean floor.
#alaska #ophiolite #sheeteddikes #paleocene #chugach
Frédéric Véron :mastodon: · @Sangokuss
1459 followers · 19144 posts · Server framapiaf.org[#BotActu] « Radiolaires, bijoux microscopiques » https://www.futura-sciences.com/planete/dossiers/zoologie-radiolaires-bijoux-microscopiques-788/#xtor%3DRSS-9 #micropaléontologie #biostratigraphie #planctonfossile #microfossiles #radiolarite #radiolaire #radiolaria #ophiolite #zoologie #silice #silica #ÀlaUne #jaspe #chert #océan #mer
#BotActu #micropaléontologie #biostratigraphie #planctonfossile #microfossiles #radiolarite #radiolaire #radiolaria #ophiolite #zoologie #silice #silica #àlaune #jaspe #chert #océan #mer