1-20 OF 30 RESULTS FOR

Urusis Formation

Results shown limited to content with bounding coordinates.
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Journal Article
Published: 01 March 2003
Journal of Sedimentary Research (2003) 73 (2): 264–279.
...Beverly Z. Saylor Abstract Superb three-dimensional exposures of mixed carbonate and siliciclastic strata of the terminal Proterozoic Urusis Formation in Namibia make it possible to reconstruct cross-basin facies relations and high-resolution sequence stratigraphic architecture in a tectonically...
FIGURES | View All (13)
Image
Cross section through the <b>Urusis</b> <b>Formation</b> oriented subparallel to the stri...
Published: 01 March 2003
Figure 3 Cross section through the Urusis Formation oriented subparallel to the strike of the basin. Datum for cross section is maximum flooding surface at top of Huns Member. This surface was selected because it is identifiable from the seaward to the landward margin and is interpreted to have
Image
Large-scale sequences in the <b>Urusis</b> <b>Formation</b> showing patterns of carbonate...
Published: 01 March 2003
Figure 12 Large-scale sequences in the Urusis Formation showing patterns of carbonate-siliciclastic mixing and stratal onlap and offlap that distinguish between tectonic and eustatic controls on sequence evolution. See text for discussion.
Journal Article
Published: 01 September 2005
Geological Magazine (2005) 142 (5): 519–538.
... subbasin. Two of these are in the siliciclastic-dominated lower part of the subgroup, which consists of the Nudaus Formation and Nasep Member of the Urusis Formation and comprises two depositional sequences. Identification and correlation of these ash beds are very well known based on stratigraphic...
FIGURES | View All (16)
Journal Article
Published: 01 September 2005
Geological Magazine (2005) 142 (5): 561–569.
...S. JENSEN; B. N. RUNNEGAR Abstract Streptichnus narbonnei igen. et isp. nov., a new trace fossil from the upper part of the Spitskop Member of the Urusis Formation, southern Namibia, consists of clusters of unidirectionally curved radial elements, in which individual elements typically are composed...
FIGURES | View All (5)
Journal Article
Published: 01 July 2000
Journal of Paleontology (2000) 74 (4): 731–740.
... the Spitzkopf Member of the Urusis Formation of Namibia, these specimens are interpreted as cf. Swartpuntia. All fossils were collected from strata containing diagnostic Early Cambrian body and trace fossils, and thus add to previous reports of complex Ediacaran forms in Cambrian marine environments...
FIGURES | View All (4)
Image
Rose diagrams showing orientations of paleoflow indicators measured in the ...
Published: 01 March 2003
Figure 5 Rose diagrams showing orientations of paleoflow indicators measured in the Urusis Formation.
Journal Article
Published: 01 January 2012
Journal of Paleontology (2012) 86 (1): 7–18.
... ichnoguild, the Multina ichnoguild seems to have been a product of the Cambrian explosion with no equivalents in the Ediacaran. Possible networks compared with Olenichnus have been recorded in the Huns Member of the Urusis Formation in Namibia by Jensen and Runnegar (2005) . However, these are very shallow...
FIGURES | View All (8)
Journal Article
Journal: PALAIOS
Published: 01 December 2002
PALAIOS (2002) 17 (6): 533–544.
.... 1 ). Radiometric dates on intercalated ash beds, Ediacaran trace and body fossils, acritarch assemblages, and carbon-isotope profiles individually and collectively identify the Kuibis and most of the overlying Schwarzrand subgroups (Nudaus and Urusis formations) as terminal Proterozoic...
FIGURES | View All (12)
Image
Figure 1. A: Generalized stratigraphy of Nama Group showing context of term...
in > Geology
Published: 01 February 2000
Figure 1. A: Generalized stratigraphy of Nama Group showing context of terminal Proterozoic treptichnids described here to Ediacara-type body fossils. Terminal Proterozoic- Cambrian boundary is thought to be within unconformity separating Urusis and Nomtsas Formations (e.g., Germs, 1995
Journal Article
Published: 01 September 2005
Geological Magazine (2005) 142 (5): 465–498.
... are again purple, rarely greyish-green argillaceous fine- to medium-grained sandstones (about 15 m), underlain by a single calcareous thin (0.5 m) unit of light grey limestone within black, greenish speckled shales, which appears to represent the Spitskop Member of the upper Urusis Formation. The c. 25 m...
FIGURES | View All (10)
Journal Article
Published: 01 December 2008
South African Journal of Geology (2008) 111 (4): 357–368.
... of the Urusis Formation (Nama Group) in Namibia (Figure 7 ). The Huis Rivier Formation of the Cango Caves Group therefore may be a correlate of the Feldschuhhorn Member of the Schwarzrand Subgroup (Nama Group). The sharp, but conformable, contact (according to Le Roux, 1997 ) between the Kombuis Member...
FIGURES | View All (13)
Image
A)  Map showing location of field area, exposures of the Nama Group, the Da...
Published: 01 March 2003
Figure 2 A) Map showing location of field area, exposures of the Nama Group, the Damara Belt (DB), and the Gariep Belt (GB). Inset shows location of Namibia in southern Africa. B) Map showing exposures of the Schwarzrand Subgroup and extent of carbonate facies in the Urusis Formation
Image
Figure  4. Biostratinomy and distribution of  Onegia . A, PIN 3992-2015 (a ...
Published: 01 January 2004
as deformation of the microbially bound sediment; presumably, short periods of deceleration in fluvial activity and low net sedimentation during formation of the channelized sandstone allowed for microbial colonization of the channel floor and also favored establishment of the Onegia population; Verkhovka Fm
Journal Article
Published: 01 September 2005
Geological Magazine (2005) 142 (5): 463–464.
... and preservation of microbial mats in siliciclastic deposits: a case study from the Upper Neoproterozoic Nama Group, Namibia . Palaios 17 , 533 – 44 . Saylor , B. Z. 2003 . Sequence stratigraphy and carbonate-siliciclastic mixing in a terminal Proterozoic foreland basin, Urusis Formation, Nama...
Journal Article
Journal: PALAIOS
Published: 01 April 2012
PALAIOS (2012) 27 (4): 252–273.
... two members of the underlying Urusis Formation, forming two discrete incised valleys ( Fig. 2 ). These are exposed in cross section in the walls of the present-day canyon, carved by a tributary of the Fish River. Valley fill units are superimposed on one another, and can be traced for hundreds...
FIGURES | View All (21)
Journal Article
Published: 01 March 2001
Geological Magazine (2001) 138 (2): 213–218.
..., central Australia, Spain and Nevada. In Namibia, Treptichnus isp. is found in the lower Huns Member of the Urusis Formation in the Schwarzrand Subgroup (Nama Group) ( Jensen et al. 2000 ). The youngest Ediacaran body fossils occur some 450 m stratigraphically above, in the Spitskop Member, near...
FIGURES
Journal Article
Journal: Geology
Published: 01 February 2000
Geology (2000) 28 (2): 143–146.
...Figure 1. A: Generalized stratigraphy of Nama Group showing context of terminal Proterozoic treptichnids described here to Ediacara-type body fossils. Terminal Proterozoic- Cambrian boundary is thought to be within unconformity separating Urusis and Nomtsas Formations (e.g., Germs, 1995...
FIGURES
Series: SEPM Special Publication
Published: 01 January 2012
DOI: 10.2110/sepmsp.101.015
EISBN: 9781565763142
... ( Treptichnus-like, Streptichnus ) as well as three-lobate trace fossils similar to Curvolithus ( Jensen et al. 2000 , Jensen and Runnegar 2005 ). In particular, this zone is well represented in the Urusis Formation of the Nama Group in Namibia. The replacement of matgrounds by mixgrounds (the “Agronomic...
FIGURES | View All (8)
Journal Article
Journal: Paleobiology
Published: 01 January 2005
Paleobiology (2005) 31 (3): 503–521.
..., for instance in the Okuniec Formation of Ukraine ( Gureev 1986 ; Velikanov 1990 ), Scandinavian strata with Sabellidites ( Jensen and Grant 1998 ), and the Urusis Formation of Namibia ( Jensen et al. 2000 ). Such traces are abundant in the middle part of the Kessyusa Formation. The trail itself...
FIGURES | View All (8)