Landscape dissection, isostatic uplift, and the morphologic development of orogens

Geology ◽  
1994 ◽  
Vol 22 (11) ◽  
pp. 963 ◽  
Author(s):  
A. R. Gilchrist ◽  
M. A. Summerfield ◽  
H. A. P. Cockburn
Virology ◽  
1964 ◽  
Vol 23 (1) ◽  
pp. 56-64 ◽  
Author(s):  
Edward P. Cohen ◽  
Sara S. Delong ◽  
James Sanders ◽  
Carlo Moscovici

1978 ◽  
Vol 129 ◽  
pp. 1-66
Author(s):  
S Funder

The Holocene stratigraphy in Scoresby Sund is based on climatic change as reflected by fluctuations in fjord and valley glaciers, immigration and extinction of marine molluscs, and the vegetation history recorded in pollen diagrams from five lakes. The histories are dated by C-14, and indirectly by emergence curves showing the patterns of isostatic uplift. From c. 10100-10400 to 9400 yr BP the major fjord glaciers showed oscillatory retreat with abundant moraine formation, the period of the Milne Land Moraines. The vegetation in the ice-free areas was a sparse type of fell field vegetation but with thermophilous elements indicating temperatures similar to the present. From 9400 yr BP the fjord glaciers retreated rapidly in the narrow fjords, the few moraines formed are referred to the Rødefjord stages and indicate topographically conditioned stillstands. At 8000 yr BP the low arctic Betula nana immigrated into the area, and in the period until 5000 yr BP dense dwarf shrub heath grew in areas where it is now absent. In the fjords the subarctic Mytilus edulis and Pecten islandica lived, suggesting a climate warmer than the present. From c. 5000 yr BP the dense dwarf shrub heath began to disappear in the coastal areas, and a 'poor' heath dominated by the high arctic Salix Arctica and Cassiope tetragona expanded. These two species, which are now extremely common, apparently did not grow in the area until c. 6000 yr BP. In lakes in the coastal area minerogenic sedimentation at c. 2800 yr BP, reflecting the general climatic deterioration.


1974 ◽  
Vol 111 (6) ◽  
pp. 481-500 ◽  
Author(s):  
G. S. Boulton ◽  
M. Rhodes

SummaryThe pattern of crustal warping in northern Spitsbergen as a result of widespread deglaciation is plotted. This is facilitated by the occurrence on ancient strandlines of pumice fragments at 4 major horizons14C dated at 6500 (A), 6200 (B), 4100 (C) and 2200 yearsb.p.(D). Trace element analyses indicate an origin for the pumice in the Jan Mayen area. At least 2 pumice horizons are thought to be contemporaneous with eruptions at 6500 and 4100 yearsb.p.


PEDIATRICS ◽  
1982 ◽  
Vol 69 (1) ◽  
pp. 33-39
Author(s):  
Sachio Takashima ◽  
Laurence E. Becker ◽  
Fu-Wah Chan

Neuronal morphologic development and the number of soma and spines in the visual cortex were investigated. Ten premature infants surviving at least three weeks were compared with control infants who had been born at term gestation and had the same postconceptional age. In six cases of sudden infant death syndrome, bronchopulmonary dysplasia, or patent ductus arteriosus, neuronal development was similar to that in the control cases. The persistence of immature neurons in two of the remaining four cases suggested a developmental neuronal delay or arrest.


1963 ◽  
Vol S7-V (4) ◽  
pp. 543-554
Author(s):  
Andre Bonnet

Abstract Reconstruction of the Quaternary terraces of the Rhone (southeast France) reveals three or possibly four levels between the Rhone delta and the Rhone-Drome confluence. The age of the lowest terrace level--best exposed at Valence-Romans and upstream--is questionable. It may represent either the Wuerm or the Riss, or it may be divided between two different stades--neo-Riss and an older stade represented by the Leore-Fouillouse terrace. The middle terrace is Rissian and the highest terrace represents the Villafranchian. This phenomenon of uplifted terraces seems to be related to an isostatic uplift of blocks to compensate for the load of glacial ice. The continuity and extent of this phenomenon would explain the relative positions of the terraces, the older higher than the younger. Cross sections are included which show the recognized terraces. A correlation chart presents the Quaternary stratigraphy of Scandinavia, the alpine regions, the Sahara, central Africa, and Australia, and includes the major archaeological divisions.


2010 ◽  
Vol 29 (15-16) ◽  
pp. 1880-1893 ◽  
Author(s):  
P.T. Fretwell ◽  
D.A. Hodgson ◽  
E.P. Watcham ◽  
M.J. Bentley ◽  
S.J. Roberts

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