Results 31 to 40 of about 856,490 (172)

A multi-proxy study of the Kalkkop impact Crater Lake deposits in south-central South Africa: implications for late neogene climate evolution [PDF]

open access: yes, 2014
Includes bibliographical references.The Kalkkop Crater Lake deposit formed as a result of a meteorite impact, and is situated ~51 km southwest of Graaff-Reinet in the Southern part of South Africa.
Mthembi, Ponani
core   +1 more source

Rapid sympatric ecological differentiation of crater lake cichlid fishes within historic times

open access: yesBMC Biology, 2010
Background After a volcano erupts, a lake may form in the cooled crater and become an isolated aquatic ecosystem. This makes fishes in crater lakes informative for understanding sympatric evolution and ecological diversification in barren environments ...
Harrod Chris   +4 more
doaj   +1 more source

Speciation: Genomic Archipelagos in a Crater Lake [PDF]

open access: yesCurrent Biology, 2016
The opening stages of speciation remain poorly understood, especially from a genomic perspective. The genomes of newly discovered crater-lake cichlid fish shed light on the early phases of diversification and suggest that selection acts on multiple genomic regions.
Ronco, Fabrizia, Salzburger, Walter
openaire   +4 more sources

MAJOR AND TRACE ELEMENT GEOCHEMISTRY OF EL CHICHON VOLCANO-HYDROTHERMAL SYSTEM (CHIAPAS, MEXICO) IN 2006-20078: IMPLICATIONS FOR FUTURE GEOCHEMICAL MONITORING [PDF]

open access: yesGeofísica Internacional, 2009
Isotopic, major and trace element composition studies for the crater lake, the Soap Pool and thermal springs at El Chichón volcano in November 2006-October 2007 confirm the complex relationship between annual rain-fall distribution and crater lake volume
M. Cassidy   +9 more
doaj  

The Sedimentary records of the Hapcheon impact crater basin in Korea over the past 1.3 Ma

open access: yesFrontiers in Earth Science, 2023
The Hapcheon impact crater is the only meteorite impact crater identified on the Korean peninsula. However, the morphology of the impact crater and the nature of the meteorite collision are unknown. In this study, we analyzed the sedimentary facies using
Jin-Young Lee   +6 more
doaj   +1 more source

CRATER LAKE COLONIZATION BY NEOTROPICAL CICHLID FISHES [PDF]

open access: yesEvolution, 2012
Volcanic crater lakes are isolated habitats that are particularly well suited to investigating ecological and evolutionary divergence and modes of speciation. However, the mode, frequency, and timing of colonization of crater lakes have been difficult to determine.
Elmer, Kathryn R.   +3 more
openaire   +4 more sources

Wind control on the accumulation of heavy metals in sediment of Lake Ulubat, Anatolia, Turkey [PDF]

open access: yes, 2009
Freshwater Lake Ulubat (zmean = 1.5-2.0 m and Area = ~138 km2), NW Anatolia, Turkey was filled in by fine-to-medium-grain silts during the late Holocene.
Sayılı, S   +8 more
core   +6 more sources

Depositional dynamics in the El'gygytgyn Crater margin: implications for the 3.6 Ma old sediment archive [PDF]

open access: yesClimate of the Past, 2012
The combination of permafrost history and dynamics, lake level changes and the tectonical framework is considered to play a crucial role for sediment delivery to El'gygytgyn Crater Lake, NE Russian Arctic.
G. Schwamborn   +5 more
doaj   +1 more source

Amplified bioproductivity during Transition IV (332 000–342 000 yr ago): evidence from the geochemical record of Lake El'gygytgyn [PDF]

open access: yes, 2013
To date, terrestrial archives of long-term climatic change within the Arctic have widely been restricted to ice cores from Greenland and, more recently, sediments from Lake El'gygytgyn in northeast Arctic Russia.
N. Nowaczyk   +15 more
core   +3 more sources

The biostratigraphy of sediments deposited in the Lake Kaali meteorite impact structure, Saaremaa island, Estonia [PDF]

open access: yesBulletin of the Geological Society of Finland, 1991
The results of lithological, biostratigraphical and chronostratigraphical studies on the Lake Kaali meteorite impact structure, Estonia (lat 58°22' N, long 22°40' E) are discussed. Two pollen diagrams and 18 radiocarbon dates from different materials are
L. Saarse   +3 more
doaj   +1 more source

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