Geologic map of the Venezuela part of the Atabapo 2 degrees x 3 degrees Quadrangle, Amazonas Federal Territory, Venezuela
J.W. Wynn, S.D. Olmore, Vicente Mendoza, Miguel Martinez, Haydee Rincon, Andres Garcia, Nelson Rivero, Ines Rendon, Iris Marcano, Elis Lugo, P. G. Schruben
1994, Miscellaneous Field Studies Map 2240
Geologic map of the Venezuela part of the Piedra de Cocuy 2 degrees x 3 degrees Quadrangle, Amazonas Federal Territory, Venezuela
J. C. Wynn, S.D. Olmore, Vicente Mendoza, Haydee Rincon, Andres Garcia, Nelson Rivero, Ines Rendon, Floyd Gray, Iris Marcano, Elis Lugo, P. G. Schruben
1994, Miscellaneous Field Studies Map 2243
Natural range expansion and local extirpation of an exotic psittacine--an unsuccessful colonization attempt
J. W. Wiley
1993, Ornitologia Neotropical (4) 43-54
The Brown-throated Parakeet Aratinga pertinax is native to Panama, northern South America, and the islands off the northern coast of Venezuela. It is widely believed that the parakeet was introduced to St. Thomas, Virgin Islands, from Curacao before the mid-19th century, although no records exist as to when and...
Coal in Latin America: 1992; Uruguay, Argentina, Chile, Peru, Ecuador, Colombia, Venezuela, Brazil, and Bolivia
J. N. Weaver
1993, Open-File Report 93-239
Geology and mineral resource assessment of the Venezuelan Guayana Shield
Water Resources Division, U.S. Geological Survey, Corporacion Venezolana de Guayana.
1993, Bulletin 2062
Geologic map of the Guri and southern part of the Tucupita 2 degrees by 3 degrees quadrangles, Bolivar State, Venezuela
D. P. Cox, Floyd Gray, Juan Acosta, John H. Stewart, Jesus Arespon, W. E. Brooks, Luis Franco, Edixon Salazar, Yolanda Lopez
1993, Miscellaneous Field Studies Map 2242
A new anoline lizard (Phenacosaurus) from the highland of Cerro de la Neblina, Southern Venezuela
C.W. Myers, E.E. Williams, R.W. McDiarmid
1993, American Museum Novitates (No. 3070)
Phenacosaurus neblininus, new species, was discovered during the 1984-1985 expedition to Cerro de la Neblina on the Venezuelan-Brazilian border. It was found at several highland camps (> 1600 m) but seems unaccountably rare, with only six specimens collected. The closest relative of this lizard may be another new species (Williams...
Estimation of undiscovered deposits in quantitative mineral resource assessments-examples from Venezuela and Puerto Rico
D. P. Cox
1993, Nonrenewable Resources (2) 82-91
Quantitative mineral resource assessments used by the United States Geological Survey are based on deposit models. These assessments consist of three parts: (1) selecting appropriate deposit models and delineating on maps areas permissive for each type of deposit; (2) constructing a grade-tonnage model for each deposit model; and (3) estimating...
Factors influencing the composition of detrital heavy mineral suites in Holocene sands of the Apure River drainage basin, Venezuela
Andrew C. Morton
1993, Special Paper of the Geological Society of America (284) 171-186
Heavy mineral assemblages in rivers in the Apure River drainage basin of Venezuela and Colombia closely reflect the nature of the source regions, which lie in the Andean orogenic terranes to the west and northwest. The Caribbean Mountains, largely composed of greenschist-facies pelites, phyllites, carbonates, and metavolcanics, supply assemblages dominated...
A new lizard of the genus Arthrosaura (Teiidae) from southern Venezuela
M.A. Donnelly, R.W. McDiarmid, C.W. Myers
1992, Proceedings of the Biological Society of Washington (105) 821-833
The mating behavior of Iguana iguana
G.H. Rodda
1992, Smithsonian Contributions to Zoology No. 534
Over a 19 month period I observed the social behaviors of individually recognized green iguanas, Iguana iguana, at three sites in the llanos of Venezuela. The behavior of iguanas outside the mating season differed from that seen during the mating season in three major ways: (1) during normal waking hours...
El manati en la tradicion y folklore de Venezuela
M. Correa-Viana, T. J. O’Shea
1992, Revista Unellez de Ciencia y Tecnologia (10) 7-13
No abstract available....
Rivulus tecminae, a new killifish from Amazonas Territory, Venezuela (Rivulidae, Cyprinodontiformes)
J.E. Thomerson, L.G. Nico, D.C. Taphorn
1992, Ichthyological Exploration of Freshwaters (2) 289-296
Abstract not supplied at this time...
Leporacanthicus triactis, a new loricariid fish from upper Orinoco River tributaries in Venezuela and Colombia (Pisces, Siluriformes, Loricariidae)
I.J. Isbrucker, H. Nijssen, L.G. Nico
1992, Die Aquarien- und Terrarienzeitschrift (DATZ) (46) 30-34
Abstract not supplied at this time...
The birds of Cerro de la Neblina, Territorio Federal Amazonas, Venezuela
D.E. Willard, M.S. Foster, G.F. Barrowclough, R.W. Dickerman, P.F. Cannell, S.L. Coats, J.L. Cracraft, J.P. O’Neill
1991, Report
Cenozoic giant pectinids from California and the Tertiary Caribbean Province: Lyropecten, "Macrochlamis," Vertipecten, and Nodipecten species
Judith Terry Smith
1991, Professional Paper 1391
Tertiary pectinids recognized for more than 125 years by field geologists can now be used to date and correlate 3-4 m.y. increments of the geologic record and to determine faunal distributions in relation to tectonic terranes. Fossil pectinids are commonly preserved in shallowmarine clastic deposits that mostly lack microfossils. The...
Geology of the Venezuelan Guayana Shield and its relation to the entire Guayana Shield
G.B. Sidder, Vicente Mendoza S.
1991, Open-File Report 91-141
Map showing free-air gravity anomalies off the coasts of Venezuela and Trinidad-and-Tobago
D. W. Folger, B.J. Irwin, J.R. McCullough, W.J. Strahle, C.O. Bowin, C. F. Polloni
1991, Miscellaneous Field Studies Map 2097-B
Road reconnaissance of anomalous radioactivity in the early Proterozoic Roraima Group near Santa Elena de Uairen, Estado Bolivar, Venezuela
William E. Brooks, Fernando Nunez
1991, Open-File Report 91-632
Mineral resource potential of the NB-20-4 Quadrangle, eastern Guayana Shield, Bolivar State, Venezuela
Jeffrey C. Wynn, Gary B. Sidder
1991, Bulletin 1960
Rivulus immaculatus, a new killifish from Venezuela (Cyprinodontiformes, Rivulidae)
J.E. Thomerson, L.G. Nico, D.C. Taphorn
1991, Copeia (1991) 323-328
Abstract not supplied at this time...
Controls on the composition of fluvial sands from a tropical weathering environment: Sands of the Orinoco River drainage basin, Venezuela and Colombia
M. J. Johnsson, R.F. Stallard, N. Lundberg
1991, Geological Society of America Bulletin (103) 1622-1647
Fluvial sands in the Orinoco River drainage basin fall into three main compositional groupings: (1) sands of subarkose and arkose composition, from high-relief parts of the Guayana Shield, where crystalline rocks are exposed; (2) sands of litharenite and sub-litharenite composition from the active orogenic belt at the western and northwestern...
Weathering processes and the composition of inorganic material transported through the Orinoco River system, Venezuela and Colombia
R.F. Stallard, L. Koehnken, M. J. Johnsson
1991, Geoderma (51) 133-165
The composition of river-borne material in the Orinoco River system is related primarily to erosion regime, which in turn is related to tectonic setting; especially notable is the contrast between material derived from tectonically active mountain belts and that from stable cratonic regions. For a particular morpho-tectonic region, the compositional...
Raptor road surveys in South America
D. H. Ellis, R.L. Glinski, D.G. Smith
1990, Journal of Raptor Research (24) 98-106
Twenty-six (23 traveling and three point) raptor roadside surveys were conducted during a 29,000 km expedition through nine nations of South America. During roadside surveys, we tallied 41 of the 87 (47%) diurnal raptor species (including vultures) that occur in South America. The number of species observed per route varied...
Geologic province map of the Venezuelan Guiana Shield
G.B. Sidder
1990, Open-File Report 90-73
