A series of Questions for our Geologists.

Anyone know where I can find references on the geology of the northern Andes? Specifically, there are some fascinating strata and foldings exposed in the highlands on the road between Quito and Tabacundo, Ecuador, and I can't find anything that explains what I'm looking at. Any help would be appreciated.

Thanks Rox,I'll try and dig up some geocoordinates on the area I'm interested in. A generic "northern Andes" will have too many different zones to be of much use (and be mostly volcanic at that - the Tabacundo area is interesting because it doesn't appear to be entirely volcanic in origin if I'm reading the strata correctly). I may not get back to this until Saturday, but I just wanted to say thanks for the offer.

Hey Rox,I guess I can withdraw my request. Turns out the stuff I thought in cursory examination was limestone is actually a loosely consolidated volcanic ash called "ceatito" in spanish (maybe "ceatite"?). In any case, it's a white layer of ash that is upt to 1.5m+ in depth around the area. So no uplift of early seabed, just (another) volcanic deposit. Still makes neat layers, tho'.Again, thanks.