Structure of Ripple Marks

  title={Structure of Ripple Marks},
  author={J. Hemingway and A. Clarke},
Neoproterozoic active margin in the northwestern Yangtze Block, South China: new clues from detrital zircon U–Pb geochronology and geochemistry of sedimentary rocks from the Hengdan Group
Abstract The Yangtze Block in South China constitutes an important Precambrian landmass in the present East Asian continent. The Neoproterozoic sedimentary successions of the Hengdan Group in the NWExpand
The role of pargasitic amphibole in the formation of major geophysical discontinuities in the shallow upper mantle
Several explanations have been proposed for variation in geophysical properties and depths for the lithosphere–asthenosphere boundary (LAB) and mid-lithospheric discontinuities (MLD). Here, weExpand
Caractérisation et facteurs de contrôle des distributions minéralogiques du Bassin Piggyback de Graus-Tremp-Ainsa (Espagne), à l’Eocène Inférieur.
Cette these propose une methodologie pour caracteriser et integrer les distributions mineralogiques des depots de l’Eocene Inferieur du Bassin de Graus-Tremp-Ainsa dans un cadre sequentielExpand
Introduction to Plate Boundaries and Natural Hazards
A great variety of natural hazards occur on Earth, including earthquakes, volcanic eruptions, tsunamis, landslides, floods, fires, tornadoes, hurricanes, and avalanches. The most destructive of theseExpand
Letters to Darwin from the Future
ABSTRACT Students, using information gained since 1859, write letters to Charles Darwin critiquing passages from the first edition of On the Origin of Species.
Bedform climbing in theory and nature
Where bedforms migiate during deposition, they move upward (climb) with respect to the generalized sediment surface. Sediment deposited on each lee slope and not eroded during the passage of aExpand
New data in the study of cross-lamination structures
The concept of the elementary (unit) series, with its basic parameters, is developed in a critical review of the classifications of cross-bedded [cross-laminated; cross-stratified] structures ofExpand
SUMMARY A noteworthy feature of parts of the Series is the development of cyclothems which consist of: scoured surface, coarse member, fine member, scoured surface. General environments, suggestedExpand
Preservation of Some Marine Current-bedding
IN the open shelf seas of north-west Europe there are large areas where the sand floor has been wrought into ridges lying approximately normal to the paths of the strongest tidal currents1. In theExpand


Die primär gerichteten Sedimentstrukturen, insbesondere die Schrägschichtung im Koblenzquarzit am Mittelrhein
ZusammenfassungDie Schrägschichtung des Koblenzquarzits, eines typischen devonischen Geosynklinalsedimentes, ist durch Wanderung von Großrippeln entstanden. Eine methodische Gefügeanalyse ergibt, daßExpand
Geometrie und Geologie von Kreuzschichtungs-Körpern
ZusammenfassungIm „Raster-Meßverfahren“ werden Kreuzschichtungs-Gefüge objektiv und vollständig erfaßt. Die Gefüge-Axen dienen zur geometrischen Beschreibung der angeschnittenen Körper. Aus ihremExpand
Some Types of Bedding in the Colorado River Delta
  • E. McKee
  • Geology
  • The Journal of Geology
  • 1939
The subaerial portion of the Colorado River Delta may be divided on the basis of texture and structure into three principal areas. The upstream area is one of deposition during periods of low-riverExpand
On the Application of Quantitative Methods to the Study of the Structure and History of Rocks
  • H. C. Sorby
  • Geology
  • Quarterly Journal of the Geological Society of London
  • 1908
1. Introduction. In the case of nearly all branches of science a great advance was made when accurate quantitative methods were used instead of merely qualitative. One great advantage of this is thatExpand