@stoneshadow,
Are you in the Central valley of California? Like S of Lassen peak?
The photos aren't the best but
1 looks like it could either be a massive sandstone or a felsite (n igneous rock ). I see no evidence of bedding
2This too could be a layered sandstone (ss) or an exfoliated igneous rock with chunks of crystals within it (called a porphyry)
3This looks like a felsite
4 This looks like layered volcanics.(There appears no real evidence of "upward fining" in the two layers . BUT, just like before, it could be that the bottom layer is a conglomerate that was eroded along its top AND A VERY FINE SEDIMENT deposited on top(while this is possible it is a a bit improbable)
5To me this looks like a basaltic rock deposited on top of an ash layer. (This is common in the northern central valley of California)
As Mr Crow says, itd be good to show geologic map of the area . (AND , net time, get a macro lens nd get some better close ups with a coin in the picture for scale)
Always have something in your picture for scale, (the bigger the feature the bigger the scale item).
If you don't have a geo map, then post a road map with a dot (make sure you hve enough political information SO ONE OF US CAN FIND IT ON A GEO MAP.