Results 131 to 140 of about 942,146 (170)

Flora of the Island of Gorgona (Tuscan Archipelago, Italy)

open access: yesWebbia, 2011
Summary After centuries of trubled history, in 1869 the Island of Gorgona (Tuscan Archipelago, Tyrrhenian Sea, Italy) became a rural penal colony and, as a consequence, of difficult access. At present, with its prison, the island is part of the Tuscan Archipelago National Park, created in 1996, the largest marine park in Europe.
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

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

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.
Michele Dalponte
exaly   +3 more sources

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   +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

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

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
G.E. Brügmann   +3 more
openaire   +1 more source

186Os–187Os systematics of Gorgona Island komatiites: implications for early growth of the inner core

Earth and Planetary Science Letters, 2003
The presence of coupled enrichments in 186 Os/ 188 Os and 187 Os/ 188 Os in some mantle-derived materials reflects longterm elevation of Pt/Os and Re/Os relative to the primitive upper mantle. New Os data for the 89 Ma Gorgona Island, Colombia komatiites indicate that these lavas are also variably enriched in 186 Os and 187 Os, with 186 Os/ 188 Os ...
Brandon, A.D.   +5 more
openaire   +2 more sources

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