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Topic: Gondwanian


In the News (Sun 3 Jun 12)

  
  Journal of the Geological Society: Early palaeozoic near-surface deformation in the neptune range, Antarctica: ...
This deformed basement is unconformably overlain by the Beacon Supergroup, a Devonian to Triassic sequence of predominantly terrestrial origin (Barrett 1991), which was intruded and overlain by Jurassic tholeiites of the Ferrar Supergroup (Kyle et al.
Further segments of the Gondwanian orogen are present in southern South America, South Africa and West Antarctica (Veevers & Powell 1994, and chapters within).
The Ross orogeny coincided with a period of broadly contemporaneous, Pan-Gondwanan thermotectonic events associated with the assembly of Gondwana, and was spatially contiguous with the Dalamarian orogeny of eastern Australia.
www.findarticles.com /p/articles/mi_qa3721/is_200307/ai_n9258692   (1406 words)

  
 Project Ucamara: Species Lists - Turbellarians   (Site not responding. Last check: 2007-10-29)
Both families are poorly represented in the Gondwanian areas, only 6 species of 27 are actually known for this region.
Among members of the suborder Dalyellioda (Order Rhabdocoela), the genus Gieysztoria (F. Dalyelliidae) is the most prominently represented in the Gondwanian regions, and therefore in the studied region.
It is possible that the representatives of Dalyellia and Microdalyellia found in Gondwanian regions are introduced species.
www.flmnh.ufl.edu /ucamara/turbellarians.htm   (1943 words)

  
 Chapter Thirteen (Part 2)
These basaltic flows, sills and dikes are probably related to rifting events associated with later breakup of Pangea.
In addition, ultramafic rocks were emplaced into Gondwanian rocks of South Africa during Early Cretaceous time.
These ultramafic intrusions are known as kimberlites and often contain high-pressure minerals such as diamond and garnet that indicate an origin within deeper portions of the upper mantle.
www.uh.edu /~geos6g/1376/latepaleolife13.html   (2654 words)

  
 Current Issue
Tribalus olexai, sp.nov. from southern Anatolia (Turkey) is described and compared with related species.
The dominant families in all studied Gondwanian sites are the extant families Mesoblattinidae (= Blattidae) and/or Blattellidae.
Adults of a small species of Umenocoleidae with polyphagoid affinities (plesiomorphies) are found in Lebanese amber (together with diverse immatures of a single species of Mesoblattinidae, and Blattulidae).
www.entomologicalproblems.sav.sk /current.html   (1216 words)

  
 EARLY GONDWANIAN AFFINITY OF THE ARGENTINE PRECORDILLERA: EVIDENCE FROM U-PB GEOCHRONOLOGY OF DETRITAL ZIRCON ...   (Site not responding. Last check: 2007-10-29)
EARLY GONDWANIAN AFFINITY OF THE ARGENTINE PRECORDILLERA: EVIDENCE FROM U-PB GEOCHRONOLOGY OF DETRITAL ZIRCON POPULATIONS FROM CAMBRIAN AND ORDOVICIAN SANDSTONES
The widely accepted interpretation that the Argentine Precordillera terrane is of Laurentian (North American) affinity is based on several lines of evidence, one of which is that the basement of the Precordillera is Grenvillian-age with a Pb isotope ratio identical to that of Grenvillian-age rocks of the Llano uplift of Texas.
All other forms of reproduction and/or transmittal are prohibited without written permission from GSA Copyright Permissions.
gsa.confex.com /gsa/2002AM/finalprogram/abstract_38454.htm   (338 words)

  
 Museum of New Zealand Te Papa Tongarewa, Wellington, NZ - Research on Terrestrial Molluscs   (Site not responding. Last check: 2007-10-29)
New Zealand’s biota is remarkably distinctive, typified by many relict lineages of plants and animal groups of Gondwanian origin, high levels of endemism, and spectacular speciation within some plant and animal groups.
In stark contrast to depauperate higher taxonomic diversity, the New Zealand land snail fauna is hyperdiverse at the generic and species levels.
The result is a fauna of about 1400 species - among the most speciose in the world for the land area.
www.tepapa.govt.nz /TePapa/English/CollectionsAndResearch/Collections/Molluscs/TerrestialMolluscs/researchterrestrial   (1415 words)

  
 Münchner Geowissenschaftliche Abhandlungen Reihe A: Geologie und Paläontologie volume 30
An annotated list of the Cretaceous tetrapods of Argentina and comments on the most significant paleobiogeographical and evolutionary issues of the South American and Gondwanian continental tetrapods are presented.
The concept of Titanosauria is reviewed to include titanosaurs of different degrees of derivation: (1) the Andesauridae provided with "normal" to very derived hyposphene-hypantrum structures, and amphyplatian caudals, and (2) the Titanosauridae without hyposphene-hypantrum, with procoelian caudals along the tail, and restricted to the Late Cretaceous.
The outstanding evolutionary pathways followed by the Cretaceous South American (and Gondwanian) continental tetrapods are emphasized.
www.pfeil-verlag.de /07pala/e2_05d.html   (2166 words)

  
 [No title]
Two fundamentally different Triassic Tethys margins are the important result of this history, a narrow active Eurasian to the north resp.
northeast and a wide passive Gondwanian along the southern and western shore.
The later now is generally regarded as evidence for a contiguity of an oceanic realm and is used as a tool for delineating the Gondwanian margin towards the deep sea of Tethys.
homepages.uni-tuebingen.de /alpshop/TGAvol/-095.html   (3025 words)

  
 panafr
Understanding the birth of Gondwana is synonymous with unraveling the tectono thermal history of the Pan Gondwanian mobile belts and the stratigraphy of their foreland basins.
In Africa, these mobile belts are known as Pan African (in South America they are called Braziliano).
To achieve this, detailed tectonic studies are ongoing in Madagascar, Northern Mozambique, Southern India and Africa.
web.uct.ac.za /depts/cigces/panafr.htm   (194 words)

  
 Sara B. Hoot - Biological Sciences - UWM
Previous phylogenetic analyses based on restriction site variation and morphology are being supplemented with the addition of new species from South America and South Africa.
These new additions will allow an assessment of a possible past Gondwanian geographical distribution for this group of plants, with concurrent implications about the timing and modes of evolution of the earliest flowering plants in general.
I and Carl Taylor of the Milwaukee Public Museum, are collaborating on a comprehensive study of evolutionary relationships, hybridity, and allopolyploid origins within a nonflowering plant family of ancient origins, Isoktaceae (the quillworts).
www.uwm.edu /Dept/Biology/Docs/Faculty/hoot.html   (616 words)

  
 acacia - Article and Reference from OnPedia.com
~1,300; See List of Acacia species Acacia is a genus of shrubs and trees of Gondwanian origin belonging to the subfamily Mimosoideae of the Pea Family Fabaceae, first described from Africa by Linnaeus in 1773.
There are roughly 1300 species worldwide: about 950 of them being native to Australia, while the remainder are spread around the dry tropical to warm-temperate regions of both hemispheres, including Africa, southern Asia, and the Americas.
Acacia senegal (Gum Arabic) King's American Dispensatory @ Henriette's Herbal
www.onpedia.com /encyclopedia/acacia   (722 words)

  
 UC Davis Geology: AGU Meeting Abstracts
First, the range coincides with a major tectonic boundary: the Taaxi-Qiaoertianshan-Hongshanhu (TQH) suture between the Qiangtang block to the south and the Songpan-Ganzi subduction-accretion complex to the north.
In the Loqzung range, the TQH suture juxtaposes Jurassic mélange and late Paleozoic diamictites of Gondwanian affinity to the south against Carboniferous strata to the north that have previously been reported to show Cathaysian affinity.
The location of this suture has formerly been disputed.
www-geology.ucdavis.edu /pubs/agu04/raterman_04.html   (531 words)

  
 Molecular Phylogeny of Osteoglossoids: A New Model for Gondwanian Origin and Plate Tectonic Transportation of the Asian ...
Molecular Phylogeny of Osteoglossoids: A New Model for Gondwanian Origin and Plate Tectonic Transportation of the Asian Arowana
serve as a cradles to convey Gondwanian freshwater faunas.
At present, the time estimates in table 3 are based on only
mbe.oxfordjournals.org /cgi/content/full/17/12/1869   (4996 words)

  
 Structure and evolution of the Himalaya−Tibet orogenic belt   (Site not responding. Last check: 2007-10-29)
The 1981 French−Chinese expedition to Tibet focused on the Lhasa block, extending earlier coverage 400 km north of the Tsangpo suture.
The Lhasa block stood between 10 and 15° N latitude over most of the Upper Cretaceous and Eocene and, if Gondwanian in origin, had detached from Gondwana by early Permian.
Seismic profiles reveal a complex Moho topography resulting both from multiple continental thrusting and large-scale strike-slip faulting.
www.nature.com /nature/journal/v307/n5946/abs/307017a0.html   (467 words)

  
 Ratites- Emu, Ostrich, Cassowary, Rhea   (Site not responding. Last check: 2007-10-29)
CONTACT US ~The Internet Farm Index of the United States~
Ratites are a diverse group of large, flightless birds of Gondwanian origin.
The African Ostrich is the largest, the Australian Emu is next in size then the Cassowary species, the Rhea being next and the Kiwis being about chicken-sized.
www.ifi-us.com /Ratites.asp   (411 words)

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