The late Miocene was an important time to understand the geological, climatic, and biotic evolution of the ancient New World tropics and the context for the Great American Biotic Interchange (GABI). Despite this importance, upper Miocene deposits containing diverse faunas and floras and their associated geological context are rare in Central America. We present an integrated study of the geolog...

Mawsoniidae are a fossil family of actinistian fish popularly known as coelacanths, which are found in continental and marine paleoenvironments. The taxon is considered monophyletic, including five valid genera (Axelrodichthys, Chinlea, Diplurus, Mawsonia and Parnaibaia) and 11 genera with some taxonomical controversy (Alcoveria, Changxingia, Garnbergia, Heptanema, Indocoelacanthus, Libys, Lual...

Chloropigments drive photosynthesis, an essentially important process in the biogeochemical cycles on Earth. Eukaryotic phototrophs have chlorophylls (Chl) a, b, and c, while prokaryotic phototrophs except for cyanobacteria, have bacteriochlorophylls (BChl) a, b, c, d, e, and g. In this study we report carbon and nitrogen isotopic compositions of chloropigments in the saline meromictic Lake Kai...

This paper presents a sedimentological and stratigraphical study of Quaternary (Middle to Late Pleistocene/Holocene) continental carbonates outcrops inside Pantanal Basin and its surroundings, especially in Serra da Bodoquena, Pantanal do Miranda and Corumbá/Ladário plateau, in the state of Mato Grosso do Sul, as well as in Serra das Araras, in the state of Mato Grosso. The aim is to understand...

A~tract--The Cretaceous/Tertiary (K/T) boundary is marked by extensive changes in the sedimentary fossil record of continental and marine life. Organic matter in sediments from above and below the K/T boundary has been studied to identify consequences of the biotic extinctions and of the changes in biological productivity which occurred at this time. Data from locations encompassing a variety o...

Abstract Rusingoryx atopocranion is an extinct alcelaphin bovid from the late Pleistocene of Kenya, known for its distinctive hollow nasal crest. A bonebed R . Lake Victoria Basin provides a unique opportunity to examine nearly complete postcranial ecomorphology species, and yields data that are important studying paleoenvironments human-environment interaction. With comparative sample extant A...

Large datasets increasingly provide critical insights into crustal and surface processes on Earth. These data come in the form of published contributed observations, which often include associated metadata. Even best-case scenario a carefully curated dataset, it may be non-trivial to extract meaningful analyses from such compilations, choices made with respect filtering, resampling, averaging c...

In the search for aqueous habitats on Mars direct proof of (ancient) flowing water is still lacking, although remote sensing has provided indications of young fluvial systems. To demonstrate that such proof can be given, we examined surface marks on recent terrestrial sand grains by atomic force microscopy (AFM) and applied a quantitative three-dimensional analysis that can numerically distingu...

Abstract The Los Guájares valley is located about 35 km south of Granada in the Internal Zones Betic Cordillera. Miocene deposits this area consist six sedimentary units separated by unconformities, which are exposed small and laterally discontinuous outcrops overlying metamorphic rocks Alpujárride Complex. lowest unit comprises upper Serravallian marls with planktonic foraminifera filling nept...