Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/Hesperian> ?p ?o }
- Hesperian abstract "The Hesperian is a geologic system and time period on the planet Mars characterized by widespread volcanic activity and catastrophic flooding that carved immense outflow channels across the surface. The Hesperian is an intermediate and transitional period of Martian history. During the Hesperian, Mars changed from the wetter and perhaps warmer world of the Noachian to the dry, cold, and dusty planet seen today. The absolute age of the Hesperian Period is uncertain. The beginning of the period followed the end of the late heavy bombardment and probably corresponds to the start of the lunar Late Imbrian period, around 3700 million years ago (Mya). The end of the Hesperian Period is much more uncertain and could range anywhere from 3200 to 2000 Mya, with 3000 Mya being frequently cited. The Hesperian Period is roughly coincident with the Earth’s early Archean Eon.With the decline of heavy impacts at the end of the Noachian, volcanism became the primary geologic process on Mars, producing vast plains of flood basalts and broad volcanic constructs (highland paterae). By Hesperian times, all of the large shield volcanoes on Mars, including Olympus Mons, had begun to form. Volcanic outgassing released large amounts of sulfur dioxide (SO2) and hydrogen sulfide (H2S) into the atmosphere, causing a transition in the style of weathering from dominantly phyllosilicate (clay) to sulfate mineralogy. Liquid water became more localized in extent and turned more acidic as it interacted with SO2 and H2S to form sulfuric acid.By the beginning of the Late Hesperian the atmosphere had probably thinned to its present density. As the planet cooled, groundwater stored in the upper crust (megaregolith) began to freeze, forming a thick cryosphere overlying a deeper zone of liquid water. Subsequent volcanic or tectonic activity occasionally fractured the cryosphere, releasing enormous quantities of deep groundwater to the surface and carving huge outflow channels. Much of this water flowed into the northern hemisphere where it probably pooled to form large transient lakes or an ice covered ocean.".
- Hesperian thumbnail Hesperia_Planum.jpg?width=300.
- Hesperian wikiPageID "32306180".
- Hesperian wikiPageLength "22942".
- Hesperian wikiPageOutDegree "99".
- Hesperian wikiPageRevisionID "672329253".
- Hesperian wikiPageWikiLink Absolute_dating.
- Hesperian wikiPageWikiLink Accretion_(astrophysics).
- Hesperian wikiPageWikiLink Albedo.
- Hesperian wikiPageWikiLink Amazonian_(Mars).
- Hesperian wikiPageWikiLink Archean.
- Hesperian wikiPageWikiLink Category:Articles_which_contain_graphical_timelines.
- Hesperian wikiPageWikiLink Category:Geologic_time_scale_of_Mars.
- Hesperian wikiPageWikiLink Category:Geological_units.
- Hesperian wikiPageWikiLink Chronostratigraphy.
- Hesperian wikiPageWikiLink Cincinnati.
- Hesperian wikiPageWikiLink Clay.
- Hesperian wikiPageWikiLink Cretaceous.
- Hesperian wikiPageWikiLink Cretaceous–Paleogene_boundary.
- Hesperian wikiPageWikiLink Cross-cutting_relationships.
- Hesperian wikiPageWikiLink Cryosphere.
- Hesperian wikiPageWikiLink Epoch_(geology).
- Hesperian wikiPageWikiLink Evaporite.
- Hesperian wikiPageWikiLink File:Hesperian_Amazonian_contact.jpg.
- Hesperian wikiPageWikiLink File:Hesperian_Surface_130S09.jpg.
- Hesperian wikiPageWikiLink File:Mars_Cross_Section.tif.
- Hesperian wikiPageWikiLink Flood_basalt.
- Hesperian wikiPageWikiLink Fossa_(geology).
- Hesperian wikiPageWikiLink Geochronology.
- Hesperian wikiPageWikiLink Geologic_map.
- Hesperian wikiPageWikiLink Geologic_record.
- Hesperian wikiPageWikiLink Geologic_time_scale.
- Hesperian wikiPageWikiLink Geological_formation.
- Hesperian wikiPageWikiLink Geological_history_of_Mars.
- Hesperian wikiPageWikiLink Geology_of_the_Moon.
- Hesperian wikiPageWikiLink Groundwater.
- Hesperian wikiPageWikiLink Hellas_Planitia.
- Hesperian wikiPageWikiLink Hesperia_Planum.
- Hesperian wikiPageWikiLink Hydrogen_sulfide.
- Hesperian wikiPageWikiLink Index_fossil.
- Hesperian wikiPageWikiLink Landform.
- Hesperian wikiPageWikiLink Late_Heavy_Bombardment.
- Hesperian wikiPageWikiLink Late_Imbrian.
- Hesperian wikiPageWikiLink Law_of_superposition.
- Hesperian wikiPageWikiLink Lunar_mare.
- Hesperian wikiPageWikiLink Mare_Tyrrhenum_quadrangle.
- Hesperian wikiPageWikiLink Mars.
- Hesperian wikiPageWikiLink Martian_meteorite.
- Hesperian wikiPageWikiLink Mineralogy.
- Hesperian wikiPageWikiLink Noachian.
- Hesperian wikiPageWikiLink Olympus_Mons.
- Hesperian wikiPageWikiLink Ordovician.
- Hesperian wikiPageWikiLink Outcrop.
- Hesperian wikiPageWikiLink Outflow_channels.
- Hesperian wikiPageWikiLink Provenance.
- Hesperian wikiPageWikiLink Radiometric_dating.
- Hesperian wikiPageWikiLink Regolith.
- Hesperian wikiPageWikiLink Relative_dating.
- Hesperian wikiPageWikiLink Remote_sensing.
- Hesperian wikiPageWikiLink Scientific_modelling.
- Hesperian wikiPageWikiLink Series_(stratigraphy).
- Hesperian wikiPageWikiLink Shield_volcano.
- Hesperian wikiPageWikiLink Silicate_minerals.
- Hesperian wikiPageWikiLink Solar_System.
- Hesperian wikiPageWikiLink Stratigraphic_unit.
- Hesperian wikiPageWikiLink Stratigraphy.
- Hesperian wikiPageWikiLink Stratum.
- Hesperian wikiPageWikiLink Sulfate.
- Hesperian wikiPageWikiLink Sulfur_dioxide.
- Hesperian wikiPageWikiLink Sulfuric_acid.
- Hesperian wikiPageWikiLink Syrtis_Major_Planum.
- Hesperian wikiPageWikiLink System_(stratigraphy).
- Hesperian wikiPageWikiLink Tectonics.
- Hesperian wikiPageWikiLink Tharsis.
- Hesperian wikiPageWikiLink Thermal_infrared_spectroscopy.
- Hesperian wikiPageWikiLink Time_travel.
- Hesperian wikiPageWikiLink Trilobite.
- Hesperian wikiPageWikiLink Type_locality_(geology).
- Hesperian wikiPageWikiLink Unconformity.
- Hesperian wikiPageWikiLink Valles_Marineris.
- Hesperian wikiPageWikiLink Vastitas_Borealis.
- Hesperian wikiPageWikiLink Volcanism.
- Hesperian wikiPageWikiLink Volcanology_of_Mars.
- Hesperian wikiPageWikiLink Weathering.
- Hesperian wikiPageWikiLink Wrinkle_ridge.
- Hesperian wikiPageWikiLink File:Hesperia_Planum.jpg.
- Hesperian wikiPageWikiLink File:Lava_flow_and_crater_ejecta.JPG.
- Hesperian wikiPageWikiLink File:Ridged_Plains_Overlying_Noachian.jpg.
- Hesperian wikiPageWikiLinkText "Hesperian Period".
- Hesperian wikiPageWikiLinkText "Hesperian period".
- Hesperian wikiPageWikiLinkText "Hesperian".
- Hesperian wikiPageWikiLinkText "early Hesperian epoch".
- Hesperian wikiPageWikiLinkText "late Hesperian".
- Hesperian wikiPageUsesTemplate Template:!.
- Hesperian wikiPageUsesTemplate Template:About.
- Hesperian wikiPageUsesTemplate Template:Clear.
- Hesperian wikiPageUsesTemplate Template:Coord.
- Hesperian wikiPageUsesTemplate Template:Mars.
- Hesperian wikiPageUsesTemplate Template:Portal_bar.
- Hesperian wikiPageUsesTemplate Template:Reflist.