Matches in DBpedia 2014 for { <http://dbpedia.org/resource/Nankoweap_Formation> ?p ?o. }
Showing items 1 to 40 of
40
with 100 items per page.
- Nankoweap_Formation abstract "The Neoproterozoic Nankoweap Formation (pronounced Nan' coe weep), is a thin sequence of distinctive red beds that consist of reddish brown and tan sandstones and subordinate siltstones and mudrocks that unconformably overlie basaltic lava flows of the Cardenas Basalt of the Unkar Group and underlie the sedimentary strata of the Galeros Formation of the Chuar Group. The Nankoweap Formation is slightly more than 100 m in thickness. It is informally subdivided into informal lower and upper members that are separated and enclosed by unconformities. Its lower (ferruginous) member is 0 to 15 m thick. The Grand Canyon Supergroup, of which the Nankoweap Formation is part, unconformably overlies deeply eroded granites, gneisses, pegmatites, and schists that comprise Vishnu Basement Rocks.The strata of the Nankoweap Formation are exposed in a small area that occupies an area from just south of Carbon Canyon to Basalt Canyon on the west bank of the Colorado River to around Comanche Creek and Tanner Canyon on the east bank of the Colorado River within the eastern Grand Canyon, Coconino County, Arizona. It and associated strata of the Unkar and Chuar groups are preserved in a prominent syncline and fault block. The most complete, readily accessible, and easily studied exposure of the Nankoweap Formation occurs in Basalt Canyon.The nomenclature of Nankoweap Formation has changed over time. Originally, the strata of the Nankoweap Formation was included in part in the top of the "Unkar terrane" (Group) and in part in the basal “Chuar terrane” (Group) by Walcott in 1894. Van Gundy first recognized the thin sequence of red beds unconformably overlying basaltic flows of the Unkar Group as a separate stratigraphic unit, which he called the “Nankoweap Group.“Although more extensive outcrops exist in Basalt Canyon, Comanche Creek, and Tanner Canyon, it is named for a small, fault-bounded block of the Nankoweap Formation in Nankoweap Canyon. It was argued that these redbeds belonged neither to the underlying Unkar Group nor overlying Chuar Group. Maxson in his geological mapping reduced Nankoweap Group to formational rank because the Nankoweap had not been subdivided into formations. Later, a locally preserved lower member (ferruginous unit and weathered zone) that unconformably overlies the Cardenas Basalt and is unconformably overlain by the upper member of the Nankoweap was recognized.".
- Nankoweap_Formation thumbnail View_from_Lipan_Point.jpg?width=300.
- Nankoweap_Formation wikiPageExternalLink index.html.
- Nankoweap_Formation wikiPageExternalLink chuar_group.htm.
- Nankoweap_Formation wikiPageExternalLink grandcanyon_supergroup.htm.
- Nankoweap_Formation wikiPageExternalLink nankoweap.htm.
- Nankoweap_Formation wikiPageExternalLink unkar_group.htm.
- Nankoweap_Formation wikiPageExternalLink great-unconformity-of-grand-canyon-part.html.
- Nankoweap_Formation wikiPageExternalLink great-unconformity-of-grand-canyon-part.html.
- Nankoweap_Formation wikiPageExternalLink supergroup.html.
- Nankoweap_Formation wikiPageExternalLink 12-1.pdf.
- Nankoweap_Formation wikiPageID "35878169".
- Nankoweap_Formation wikiPageRevisionID "581760013".
- Nankoweap_Formation age "Neoproterozoic, <770 Ma".
- Nankoweap_Formation caption "Venus Temple, NNW of Lipan Point; tilted layers of Nankoweap Formation above tilted Cardenas Basalt.".
- Nankoweap_Formation country Southwestern_United_States.
- Nankoweap_Formation extent "Grand Canyon, Colorado River region".
- Nankoweap_Formation hasPhotoCollection Nankoweap_Formation.
- Nankoweap_Formation imagesize "295".
- Nankoweap_Formation namedby "Van Gundy , Van Gundy , and Maxson".
- Nankoweap_Formation namedfor "Nankoweap Canyon".
- Nankoweap_Formation overlies Cardenas_Basalt.
- Nankoweap_Formation period "Neoproterozoic".
- Nankoweap_Formation prilithology "sandstone, siltstone & shale".
- Nankoweap_Formation region "Arizona east Grand Canyon Lava Butte region on Colorado River, near Lipan Point".
- Nankoweap_Formation thickness "approximate maximum".
- Nankoweap_Formation type Formation_(stratigraphy).
- Nankoweap_Formation underlies "Chuar Group and, as part of the Great Unconformity, the Tapeats Sandstone".
- Nankoweap_Formation unitof Grand_Canyon_Supergroup.
- Nankoweap_Formation subject Category:Geologic_formations_of_the_United_States.
- Nankoweap_Formation subject Category:Geology_of_Arizona.
- Nankoweap_Formation subject Category:Grand_Canyon.
- Nankoweap_Formation comment "The Neoproterozoic Nankoweap Formation (pronounced Nan' coe weep), is a thin sequence of distinctive red beds that consist of reddish brown and tan sandstones and subordinate siltstones and mudrocks that unconformably overlie basaltic lava flows of the Cardenas Basalt of the Unkar Group and underlie the sedimentary strata of the Galeros Formation of the Chuar Group. The Nankoweap Formation is slightly more than 100 m in thickness.".
- Nankoweap_Formation label "Nankoweap Formation".
- Nankoweap_Formation sameAs m.0jwwq6v.
- Nankoweap_Formation sameAs Q14439111.
- Nankoweap_Formation sameAs Q14439111.
- Nankoweap_Formation wasDerivedFrom Nankoweap_Formation?oldid=581760013.
- Nankoweap_Formation depiction View_from_Lipan_Point.jpg.
- Nankoweap_Formation isPrimaryTopicOf Nankoweap_Formation.
