Field Trip To Ione Basin--March 8, 2004

Western Foothills Of The Sierra Nevada

Amador County, California

One of many brilliant blue ponds in the Ione Basin, western foothills of the Sierra Nevada, Amador County, California. This one lies in a brilliant white, fluviatile (river-deposited), silica-rich sandstone of the Middle Eocene Ione Formation, situated in the vicinity of Lygodium Gulch (named after the rather common to abundant remains of a fossil climbing fern, Lygodium kaulfussi, whose closest modern counterpart is the living Lygodium palmatum, now native to Mississippi, Alabama and Georgia north to New England); Lygodium Gulch is certainly one of the great fossil leaf localities in the Ione Basin. Image taken on March 8, 2004.

Please note: All fossil localities in the Ione Formation of Amador County, California, presently occur on private property; explicit permission from the land owners must be secured before collecting fossils there.

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