Summary[edit] Description: Català: Pomatias elegans, Massís del Montgrí, maig del 2012. Noteu la presència de l'opercle calcari replegat a sota de la conquilla, els ulls a la base dels tentacles i la seva probòscide. English: Pomatias elegans Montgrí Massif, May 2012. Note the presence of calcareous operculum fallen back under the shell, eyes at the base of the tentacles and its proboscis. Date: 13 May 2012. Source: Own work. Author: Bestiasonica.
Summary[edit] Description: English: Photo of a living Diplopoma crenulatum (terrestrial gastropod of the Annulariidae family) taken at the Barre de Cadoue site in the Réserve Biologique Dirigée du Nord de la Grande-Terre in Guadeloupe (French West Indies). Français : Photo d'un Diplopoma crenulatum vivant (Gastéropode terrestre de la famille des Annulariidae) prise sur le site de la Barre de Cadoue au sein de la Réserve Biologique Dirigée du Nord de la Grande-Terre en Guadeloupe (Antilles Française, Département d'outre-mer). Date: 14 August 2021. Source: Own work. Author: Coline971.
James St. John|sourceurl=https://flickr.com/photos/47445767@N05/49763985051%7Carchive=%7Creviewdate=2020-04-14 03:00:12|reviewlicense=cc-by-2.0|reviewer=FlickreviewR 2
Wikimedia Commons
Summary[edit] Description: Littoraria angulifera (Lamarck, 1822) - mangrove periwinkle snail shell, modern (latest Holocene) The gastropods (snails & slugs) are a group of molluscs that occupy marine, freshwater, and terrestrial environments. Most gastropods have a calcareous external shell (the snails). Some lack a shell completely, or have reduced internal shells (the slugs & sea slugs & pteropods). Most members of the Gastropoda are marine. Most marine snails are herbivores (algae grazers) or predators/carnivores. Classification: Animalia, Mollusca, Gastropoda, Littorinidae Locality: Lighthouse Point beach, southern shore of the eastern tip of Sanibel Island, Gulf of Mexico coast of southern Florida, USA See info. at: en.wikipedia.org/wiki/Littoraria_angulifera. Date: 12 April 2020, 02:22. Source: Littoraria angulifera (mangrove periwinkle snail shell) (Sanibel Island, Florida, USA) 1. Author: James St. John.
Description: Calcrete paleosol (13 cm across) - calcretes are a common type of paleosol in San Salvador Island’s bedrock. Calcretes are lithified soil horizons, and are composed of calcium carbonate (CaCO3). Calcretes are (& were) hard as rock, but they are still soil horizons. Calcretes are extreme forms of pedocal soils, and are often developed on carbonate platform islands. This Late Pleistocene calcrete is developed above an aeolian calcarenite unit (a wind-deposited limestone composed of sand-sized calcareous grains). The upper surface of the calcrete has a somewhat smoothed nodular nature (see photo elsewhere in this album). The underside (shown here) has cemented lime sand, vegemorphs/rhizocretions, a pisolite, a fossil Tectarius snail shell, and three fossil Cerion land snail shells. Stratigraphy - paleosol capping eolian calcarenites at the top of the Cockburn Town Member, Grotto Beach Formation, Upper Pleistocene Locality: inland roadcut, southeastern San Salvador Island, eastern Bahamas. Date: 13 September 2014, 19:43. Source: Calcrete paleosol (top of Cockburn Town Member, Grotto Beach Formation, Upper Pleistocene; inland roadcut, southeastern San Salvador Island, eastern Bahamas) 2. Author: James St. John.