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is carefully cultivated & usually irrigated but it is rarely a quarter of a mile wide.  The whole length of the valley is a series of little fields of a few acres to some of 10 or 15, around & between which the river runs.  The side slopes are steep & stony & in places cliffy but mainly forested or bushy.  

[[underline]] Zones [[/underline]]: - [[underline]] Upper Sonoran [[/underline]] zone fills the open part & warm slopes of the valley up to near the mouth of Dalton Creek, about 7 miles above Pecos, where the last Juniper of both species, nut pine & live oak scrub was seen at about 7500 feet.

The main part of the valley is [[underline]] Transition [[/underline]] zone yellow pine forest on the cold slopes below Dalton Creek and the warm slopes and open country above.  Pseudotsuga, Quercus gambeli, Populus angustifolia, Salix cordata, Rhus & many other Transition shrubs & one Pinus strobiformis mark the zone.  

[[underline]] Canadian zone [[/underline]] begins on steep N.E. slopes just below the mouth of Dalton Creek, actually meeting the edge of Upper Sonoran on the opposite slope.  Picea and Abies mark the zone and