...DANA P. LOOMIS; DOUGLAS W. BURBANK Abstract The Ricardo Group is a 1,700-m-thick sequence of Miocene volcanic rocks and continental sedimentary rocks deposited between ∼ 19 and 7 Ma in the El Paso basin, near the junction of the Garlock fault and the Sierra Nevada frontal fault in southern...

... originally defined in 1941, the fossil fauna of the DSF (now, part of the Ricardo Group) was one of four fossil assemblages named as principal correlatives of the Clarendonian mammal age. Early radiometric work yielded a maximum age of 10.0 Ma for this fossil assemblage, and by correlation to the Great...

... 31.80(20), total 100.34(46) wt.%. The empirical formula, based on Σ( Me + S) = 25, is Cu 8.04 (Fe 2.03 In 0.02 ) Σ2.05 Zn 0.96 Ge 1.94 S 12.01 , ideally Zn 2+ . Omariniite is orthorhombic, space group I 222, with unit-cell parameters: a = 10.774(1), b = 5.3921(5), c = 16.085(2) Å, V = 934.5(2) Å 3...

... at the surface. The age of the basalt within the Tertiary is in doubt, but if it is correlative with the Ricardo formation as inferred by Gale (1946 , p. 335), it would be of early Pliocene age. The Red Buttes quartz basalt of Pliocene(?) age is here defined as a local formation within the Tropico group...

...¸ afak. Collision-Driven Slab Breakoff Magmatism in Northwestern Anatolia, Turkey, 63 Ando` , Sergio. See Garzanti, Eduardo Andonaegui, Pilar. See Arenas, Ricardo Application of Cathodoluminescence Imaging to the Study of Sedimentary Rocks, by Sam Boggs Jr. and David Krinsley. Review by Roger Mason, 710...

...José Perelló Maybe I could say that I came to know about geology by accident or simply luck, when in the summer prior to my last year at high school, while vacationing in the island of Chiloé in southern Chile, I met a group of geologists on their way to conduct regional mapping in Aysén, even...

... indicate deposition or emplacement at near equatorial paleolatitudes (2.1°N ± 3.4°). This paleolatitude estimate is statistically indistinguishable from those previously observed in the La Boca Formation of the Huizachal Group in northeast Mexico. The localities we sampled in southern Mexico are separated...

...L. B. Freund; D. M. Barnett; Ricardo Dorby; Issa Owies; Alfredo Urzua Copyright © 1976, by the Seismological Society of America ANNOUNCEMENTS 2083 and Geodetic Survey and its successor agencies from 1928 through 1973. A ~ u a t i ~ a rates and intensity-magnitUde relations are determined...

... A. Sternbach “Super basins: New paradigm for oil and gas supply” by Robert E. Fryklund and Philip (Pete) Stark “The Neuquén Super Basin” by Ricardo Veiga, Gustavo D. Vergani, Ignacio Brisson, Carlos E. Macellari, and Hector A. Leanza “The Bakken–Three Forks super giant play, Williston Basin...

..., figs. 1–5. Rickards ( 1973 ) further assigned a “genolectotype” as “Geol. Surv. Canada, 949g; fig. d. Hall, 1858 , Pl. 14, fig. 4, Quebec Group, near Point Levis.” Pseudotrigonograptus? ricardo sp. nov.; Figs.  3A–3E Fig. 3. (A– E) Pseudotrigonograptus ? ricardo sp. nov.: (A) holotype...

...Bingjian Li; Vsevolod Egorov; Ricardo Perona; David Haddad; Katy Sementelli; Chicheng Xu; Chrystianto Mardi Mohebian et al . revolutionize fracture identification by using the YOLOv5 deep-learning algorithm on borehole image logs, shifting from manual to automated processes. The algorithm...

... of the stratigraphic terms that have been used, this paper recommends as a uniform nomenclature for future work: Santa Rosa Group (Permian); Todos Santos Formation (Jurassic-Cretaceous); and Ixcoy and Sepur Formations (Cretaceous). 3 Division of Geological and Planetary Sciences, California Institute...

...Ricardo Landim Bormann de Borges; Marcel Carvalho de Jesus; Ricardo Costa Rodrigues de Camargo; Francisco de Assis Ribeiro dos Santos Abstract Honey samples produced in the years 2010 and 2011, in an area of caatinga vegetation in the semi-arid region of Piauí State (Brazil), were analyzed using...

...Ricardo Dobry; Issa Oweis; Alfredo Urzua abstract A study was made of simplified procedures for estimating the fundamental period, T , of a linear or equivalent linear model of a soil profile. Closed form solutions and approximate methods for computing the first period of an elastic shear-beam...

... functional group—and the sole sugar in RNA ( Fig. 1 ). It has many structural isomers, i.e. sugars having the same chemical composition but different structures, which can be seen in such compounds as xylose [(2) in Fig. 1 ], lyxose [(3) in Fig. 1 ], arabinose [(4) in Fig. 1 ], ribulose, and xylulose...

...Ricardo Landim Bormann de Borges; Marcel Carvalho de Jesus; Ricardo Costa Rodrigues de Camargo; Francisco de Assis Ribeiro dos Santos Abstract Samples of honey, called marmeleiro honey by its producers, from the state of Piauí, Brazil, were analysed to study their pollen contents. Samples were...

...Antonio Silva, M.EERI; Jose Miguel Castro; Ricardo Monteiro State-of-the-art seismic performance assessment of buildings requires a realistic estimation of the repair cost of structural and non-structural components. In this context, the US-based FEMA P-58 guidelines feature a procedure and repair...

..., on the Monterey, it is obvious that the Cierbo and Briones zones are faunal divisions of the latter formation. They are apparently confined to its upper half. As Clark, in his fine monograph 4 on the San Pablo group and elsewhere, has viewed the horizons as being characteristic and distinct, at least two...

...Charles T. Young; John R. Booker; Ricardo Fernandez; George R. Jiracek; Mario Marginez; James C. Rogers; John Stodt; Harve S. Waff; Phillip E. Wannamaker Abstract Given the degree of complexity of modern magnetotelluric (MT) instrumentation, comparison of the total performance for two or more...