Results 131 to 140 of about 258 (166)

Palaeogene komatiites from Gorgona Island

Nature, 1979
UNMETAMORPHOSED mafic and ultramafic rocks overlain by Neogene oceanic sediments are exposed on Gorgona Island which is a remnant of the Coastal Cordillera along the Pacific margin of Colombia1. Gorgona is one of the rare places in the world where young pyroxenitic komatiites exhibiting typical quenched spinifex textures (Fig. 1) occur.
W E Cameron
exaly   +2 more sources

Individual Tree Crown Delineation and Biomass Estimation from LiDAR Data in Gorgona Island, Colombia

IGARSS 2023 - 2023 IEEE International Geoscience and Remote Sensing Symposium, 2023
Biomass estimation is a crucial component in the areas of carbon storage and forest management. Biomass can be analyzed rather at forest or at Single Tree Level (STL) and studies in both directions can be found in literature. Nevertheless, working at STL provides more accurate estimations.
Yady Tatiana Solano-Correa, Michele Dalponte, Edgar Leonairo Pencue-Fierro   +2 more
exaly   +3 more sources

Morphological observations on some fleshy crustose algae of the Island of Gorgona (Tuscan Archipelago)

Giornale Botanico Italiano (Florence, Italy: 1962), 1992
Abstract Morphological and ecological observations on four fleshy crustose algae collected in the eulittoral and upper sublittoral zone of the Island of Gorgona: Myrionema liechtenstenii Hauck, Hildenbrandia canariensis B⊘rgesen, Peyssonnelia armorica (P. et H. Crouan) Weber-van Bosse in B⊘rgesen and Cruoria cruoriaeformis (P. et H. Crouan) Denizot are
Gianfranco Sartoni, Silvia Boddi
exaly   +2 more sources

Pb isotopes of Gorgona Island (Colombia): isotopic variations correlated with magma type

Earth and Planetary Science Letters, 1984
Abstract Lead isotopic results obtained on komatiites and basalts from Gorgona Island provide evidence of large isotopic variations within a restricted area (8 × 2.5 km). The variations are correlated with differences in volcanic rock type. The highest isotopic ratios ( 206 Pb/ 204 Pb∼ 19.75 ) correspond to tholeiites which make up most of the ...
B Dupré
exaly   +2 more sources

Implications of 187Os isotopic heterogeneities in a mantle plume: evidence from Gorgona Island and Curaçao

Geochimica Et Cosmochimica Acta, 1999
Recent work has suggested that the mafic-ultramafic volcanism in evidence throughout portions of the Caribbean, Central America, and northern South America, including the islands of Gorgona and Curacao, was generated as part of a middle-Cretaceous, large igneous province.
Richard J Walker, Michael Storey, Andrew C Kerr   +2 more
exaly   +2 more sources

Noble metal abundances in komatiite suites from Alexo, Ontario and Gorgona Island, Colombia

Geochimica Et Cosmochimica Acta, 1987
Abstract The distribution of the chalcophile and siderophile metals Cu, Ni, Au, Pd, Ir, Os and Ru in an Archaean komatiite flow from Alexo, Ontario and in a Phanerozoic komatiitic suite of Gorgona Island, Colombia, provides new information about the geochemical behaviour of these elements. Copper, Au and Pd behave as incompatible elements during the
N T Arndt, A W Hofmann
exaly   +2 more sources

Petrology and geochemistry of komatiites and tholeiites from Gorgona Island, Colombia

Contributions to Mineralogy and Petrology, 1984
Komatiitic rocks from Gorgona Island, Colombia, in contrast to their Archaean counterparts, occur as rather structureless flows. In addition, textural and mineralogical features indicate that the Gorgona komatiites may have crystallized from superheated liquids.
Bruce G. Aitken, Lina M. Echeverr�a
openaire   +1 more source

First Record Of The Order Mecoptera (Insecta) For The Gorgona Island (Colombia), With The Description Of A New Species

Zootaxa, 2016
During a review of material from the project “Assessment of the current status of the faunistic conservation objects from the Gorgona Island: a holistic approach to the ecological evaluation of the Gorgona Natural National Park”, conducted 2010‒2011, a male specimen of Pazius Navás, 1913 (Mecoptera: Bittacidae) was found.
Ascuntar-Osnas, Oscar, Domínguez, Diana Torres, Ulloa, Patricia Chacón De, Machado, Renato Jose Pires   +3 more
openaire   +3 more sources

Pyroclastic rocks: another manifestation of ultramafic volcanism on Gorgona Island, Colombia

Contributions to Mineralogy and Petrology, 1986
Tertiary ultramafic volcanism on Gorgona Island, Colombia, is manifested not only by komatiite flows, but also by a more voluminous sequence of tuff breccias, which is cut by comagmatic picrite dikes. The ultramafic pyroclastic rocks are chaotic to stratified mixtures of angular to subrounded glassy picritic blocks and a fine grained volcaniclastic ...
Echeverría, Lina M., Aitken, Bruce G.
openaire   +1 more source

Contribution to the knowledge of the vegetation of the Gorgona Island (Tuscan Archipelago).

2009
Vegetation survey - first ...
VICIANI, DANIELE, Albanesi D., FOGGI, BRUNO   +2 more
openaire   +1 more source