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successive strata of lava flows from the top down to where the talus hides them. - See photo - The sheets are 20 to 50 feet thick & of a roughly basaltic formation. The [[strikethrough]] little [[/strikethrough]] crater above has a wide old rim & a steep [[strikethrough]] cone [[/strikethrough]] secondary cone in the middle.

[[image - sketch of the crater]]

On the south side of the river valley the slopes rise more gradually & are covered with timber of Transition zone species and a few Canadian species toward the tops. Upper Sonoran zone covers the warm slopes of the valley & nut pine & juniper run to the top of the lava escarpment.

Our camp on the river bottom at 8300 feet is close to the edge of the cottonwood bottoms that follow the river.

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