Results 21 to 30 of about 66,937 (185)

Sporopollenin chemistry and its durability in the geological record: an integration of extant and fossil chemical data across the seed plants

Palaeontology, Volume 64, Issue 2, Page 285-305, March 2021., 2021
Abstract Sporopollenin is a highly resistant biopolymer that forms the outer wall of pollen and spores (sporomorphs). Recent research into sporopollenin chemistry has opened up a range of new avenues for palynological research, including chemotaxonomic classification of morphologically cryptic taxa. However, there have been limited attempts to directly
Phillip E. Jardine, Carina Hoorn, Maxine A.M. Beer, Natasha Barbolini, Amber Woutersen, Giovanni Bogota‐Angel, William D. Gosling, Wesley T. Fraser, Barry H. Lomax, Huasheng Huang, Matteo Sciumbata, Huajie He, Guillaume Dupont‐Nivet, Evelyn Kustatscher   +13 more
wiley   +1 more source

Rapid ecological assessment of mammals from a locality of middle basin at Palmar River, Zulia state, Venezuela

Mammalogy Notes, 2018
Here we present the results from a rapid ecological assessment of mammals within Campo Boscán, located in the middle basin of the Palmar River in Zulia state, Venezuela.
Belkis A. Rivas, Arnaldo Ferrer, Olga L. Herrera-Trujillo, David A. Prieto-Torres   +3 more
doaj   +1 more source

Baroclinic geostrophic adjustment in a rotating circular basin [PDF]

, 2004
Baroclinic geostrophic adjustment in a rotating circular basin is investigated in a laboratory study. The adjustment process consists of a linear phase before advective and dissipative effects dominate the response for longer time. This work describes in
Imberger, J, Ivey, GN, McDonald, NR, Stocker, R, Wake, GW   +4 more
core   +1 more source

New insights into the genesis of the Miocene collapse structures of the island of Gozo (Malta, central Mediterranean Sea) [PDF]

, 2015
The large palaeosinkholes located in the NW of Gozo (central Mediterranean Sea, Malta) offer excellent exposures that provide information on the geometry and kinematics of large karst-related collapse structures.
Galve, J. P., Gutierrez, F., LUGLI, Stefano, SOLDATI, Mauro, Tonelli, C., VESCOGNI, Alessandro   +5 more
core   +1 more source

Black shale deposition and early diagenetic dolomite cementation during Oceanic Anoxic Event 1: The mid-Cretaceous Maracaibo Platform, northwestern South America [PDF]

, 2016
Thin laterally continuous organic-rich dolomitic marlstones were deposited in the extended Late Aptian - Early Albian epicontinental sea of northwestern South America.
Brocks, JJ, Gonzalez-Arismendi, G, Gueneli, N, Konhauser, KO, Méndez-Dot, JA, Petrash, DA, Poulton, SW   +6 more
core   +1 more source

Recent ecological change in ancient lakes [PDF]

, 2018
Ancient lakes are among the best archivists of past environmental change, having experienced more than one full glacial cycle, a wide range of climatic conditions, tectonic events, and long association with human settlements.
Albright T. P., Broberg O., Egorov A. G., ESA, Grosswald M. G., Jackson M. C., Jaffé R., Jassby A. D., Kozhova O. M., Lisiecki L. E., Lyons R. P., Mamontov A. E., Mdegela R. H., Moore M. V., Musa S., Pawley A., Priscoll J. D., Rossiter A., Sarvala J., Seehausen O., Stanković S., Wulf A.   +21 more
core   +3 more sources

Strong tectonic and weak climatic control on exhumation rates in the Venezuelan Andes [PDF]

, 2013
International audienceWe studied the relationships among present-day relief, precipitation, stream power, seismic energy, seismic strain rate, and long-term exhumation rates for the Venezuelan Andes. Average long-term exhumation rates were determined for
Bermúdez, Mauricio,, Bernet, Matthias, van Der Beek, Pieter   +2 more
core   +3 more sources

HEMIBRYCON GUEJARENSIS, A NEW SPECIES FROM THE GÜEJAR RIVER, ORINOCO BASIN, COLOMBIA (CHARACIFORMES: CHARACIDAE) WITH A REVIEW THE POPULATIONS IDENTIFIED AS HEMIBRYCON METAE

Revista de Investigaciones Universidad del Quindío, 2017
Hemibrycon guejarensis, new species, is described from the Güejar River, La Macarena mountain range, upper Guaviare River drainage, Colombia. The new species is distinguished from most cis-Andean congeners (H.
César Román-Valencia, Raquel I Ruiz-C, Donald C. Taphorn B.   +2 more
doaj   +1 more source

Lightning Flash Rate in the Lake Maracaibo, Venezuela Related to Sea Surface Temperatures and Tropospheric Air Flow

, 2018
Northern Venezuela’s Lower Maracaibo Basin (LMB) has the highest Lightning Flash Rate (LFR) density in the world. The area receives approximately 200 flashes/km annually.
Deirdre Smith
semanticscholar   +1 more source

Taxonomic review of Colombian Parodon (Characiformes: Parodontidae), with descriptions of three new species

Neotropical Ichthyology
We review species of Parodon Valenciennes, 1850 from the Magdalena, Cauca, Orinoco, Amazonas, Atrato and Caribbean-Guajira River basins of Colombia using meristic and morphological characters.
Alejandro Londoño-Burbano, César Román-Valencia, Donald C. Taphorn   +2 more
doaj   +1 more source