. Bulletin. De l'ethnologie. 290 BUREAU OF AMERICAN ETHNOLOGY [Bull. 154 River dans le soi-disant vallée canadienne. Il se trouve dans le NI/2, SW14, sec. 31, 11 N. R. T., 37 E., N. M. Pr. M. et B. et est de 214 miles au sud de la route des États-Unis 66,1  % à l'Est du Nouveau Mexique de la route 18 et 8 km au sud et à l'est de Tucumcari (fig. 31). La Plaza Larga est un abruptes, à fond de sable, d'eau intermittent qui transporte de l'eau uniquement pendant et immédiatement après les pluies. C'est couper relativement souple en sable et limon argileux des alluvions déposés pré- viously, mais localement, comme sur le site, est bordé par le rock c

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. Bulletin. Ethnology. 290 BUREAU OF AMERICAN ETHNOLOGY [Bull. 154 River in the so-called Canadian Valley. It lies in the NI/2, NE14, sec. 31, T. 11 N., R. 37 E., N. M. Pr. M. and B. and is 214 miles south of United States Highway 66, 1% miles east of New Mexico Highway 18 and 8 miles south and east of Tucumcari (fig. 31). The Plaza Larga is a steep-sided, sandy-bottomed, intermittent stream which carries water only during and immediately after local rains. It is cut in comparatively soft clayey sand and silt of pre- viously deposited alluvium, but locally, as at the site, is bordered by rock cliffs. The introduction of irrigation water into the area ^ already tends to increase the period of flow and to keep the stream. { V. j^' Deaf Smith Co Tf^-iT i 1 " â fA/ SfinJQn Site If .â <-â ' h / -J'ct S ^ Curry Co. ââ, â U.^ Figure 31.âIndex map showing location of the Hodges and San Jon sites. bed moist for considerable lengths of time. Hence, grass, trees, and bushes will grow and for this reason the regime of the stream will be changed and some aggradation of its channel will be induced. Thus the irrigation project will very probably effect an artificial and local change in the stream which will reverse the present trend. The Chinle formation, of Triassic age, forms the floor of the valley plains of the Canadian River throughout this section of New Mexico. It is predominately brick-red in color, but locally green to buff. It consists of an upper member, the Redondo (Dobrovolny, Summer- " The Arch Hurley Conservancy District, centering around Tucumcari, will eventually consist of 45, 000 acres of Irrigated land. Water is being drawn from the lake behind Conchas Dam, just below the confluence of the Conchas and Canadian Rivers, 30 miles northwest of Tucumcari. The dam was built before the war by the D. S. Army Engineers as a flood control project.. Please note that these images are extracted from scanned page images that may have been digitally enhanced

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