... not conducive for arroyo formation along the floors of desert valleys. After a hiatus in arroyo formation, the frequency of arroyo cutting and filling increased dramatically after 4000 14 C yr B.P. The early Holocene arroyos and increased frequency of arroyo incision after 4000 14 C yr B.P. are related...

... and tectonics; however, how and why they form remain poorly understood. Here, we focus on Arroyo Seco in the central California Coast Ranges, where we test hypotheses for strath planation and subsequent strath terrace formation. Several lines of evidence indicate that strath planation is triggered by braiding...

... American Association of Petroleum Geologists Baltz’ critical review should have been directed more to my late 1967 paper, Biostratigraphy and carbonate facies of the Mississippian Arroyo Peñasco Formation, north-central New Mexico , published as New Mexico Bureau of Mines and Mineral Resources...

.... Publication authorized by Director, U.S. Geological Survey. 2 Geologist, U.S. Geological Survey. © 1969 American Association of Petroleum Geologists. All rights reserved 1969 American Association of Petroleum Geologists In the interim report on the Mississippian Arroyo Peñasco Formation...

... of north-central New Mexico, Precambrian crystalline rocks are overlain at many places by the Arroyo Peñasco Formation, a thin sequence of shallow-marine to intertidal clastic and carbonate rocks of late Osage to middle Meramec (Mississippian) age. In 1962 the writers measured and re-collected...

... River Canyon of southern Colorado. The formation in which the fossils occur is discontinuous, preserved only as isolated erosional remnants. The most complete section observed, and the best fossil locality, is in Arroyo Penasco in the San Ysidro Quadrangle, Sandoval County, New Mexico. It is proposed...

...Robert L. Bates ABSTRACT Surface exposures in the walls of Rocky Arroyo and adjacent canyons, 12 miles northwest of Carlsbad, New Mexico, reveal an abrupt lateral change in lithology in the Seven Rivers formation. A 275-foot section of gypsum with thin beds of dolomitic limestone merges...

...Robert L. Bates The paper embodies results of a study of surface exposures of Rocky Arroyo, 12 miles northwest of Carlsbad, New Mexico. In the walls of this and adjacent canyons is revealed an abrupt lateral change in lithology in the Seven Rivers formation. A 275-foot section of gypsum with thin...

... began to dominate, channel erosion was typically initiated by a shift from relatively warmer and drier to cooler and wetter climates. The timing of erosion events exhibits a remarkable correlation to arroyo formation and paleosol formation of ephemeral streams in the North American southwest...

.... However, most of this material has been sourced from the oldest member, the Arroyo Formation, and the understanding of the paleoecosystem of the younger Vale and Choza formations is less well resolved. Here we present a previously undescribed Vale locality, the first vertebrate-bearing locality from...

...David S. Berman Abstract Well preserved tooth plates, vomerine teeth, and lower jaws of the lungfish Gnathorhiza, collected from the Lueders and Arroyo Formations [in Baylor County, north-central Texas], are in close accord with those of other late Paleozoic dipnoans, particularly Sagenodus...

...Bryan M. Gee; Robert R. Reisz Abstract Nanobamus macrorhinus Schoch and Milner, 2014 is a small amphibamiform temnospondyl from the early Permian Arroyo Formation of Texas. It is most readily characterized by an elongate and partially subdivided naris. This condition is superficially reminiscent...

... correlations imply that the exact age of the Richards Spur deposits is uncertain, and equivalence to the Arroyo Formation of Texas may be erroneous. Les éléments isolés d'un squelette d'amphibien du genre Seymouria ont été récemment découverts dans la localité de Richards Spur, près de Fort Sill, en...

...David W. Dilkes Abstract Restudy of the only indisputable larval temnospondyl from the Lower Permian (Arroyo Formation: Clear Fork Group) of North America has revealed the presence of a narial flange, which supports its assignment to the superfamily Dissorophoidea. Two families of dissorophoids...

...R. R. Reisz; M. J. Heaton Abstract Bayloria morei from the Lower Permian (Arroyo Formation, Clear Fork Group: Leonardian) of Baylor County, Texas, formerly thought to be the smallest known pelycosaur, is an immature specimen of the captorhinid reptile Captorhinus aguti . As the latter name has...