Erratum     

Guest Editor Rahul Sharma 《Marine Georesources & Geotechnology》2013,31(1):61-62

Abstract

Several physical aspects of continuous subbottom profiling are presented, and their relationship to operating characteristics of profiling instruments is discussed. Interpretation of data produced by shallow‐penetration continuous profilers, such as the SONIA system, is a process of transformation of the continuous measurement of the travel times of reflected sound pulses into geologic phenomena. Essentially, the continuous profiler is a geologic tool; interpretation of the data is based on geologic observation and reasoning, irrespective of the further use of the information obtained in applied science. However, interpreters must have sufficient knowledge of the geophysical system and of the equipment design to be in a position to evaluate the significance of their interpretation.  相似文献   

Understanding Lyα emitters     

Kim K. Nilsson  Guest Editors  Klaus Meisenheimer 《New Astronomy Reviews》2009,53(3):37

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TOPO-EUROPE: The Geoscience of coupled: Deep Earth–surface processes     

Sierd Cloetingh  Guest editor  Hans Thybo  Guest editor  Claudio Faccenna  Guest editor 《Tectonophysics》2009,474(1-2)

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Ray-theory Green's function reciprocity and ray-centred coordinates in anisotropic media     

J-M. Kendall  W. S. Guest  C. J. Thomson 《Geophysical Journal International》1992,108(1):364-371

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A large dacitic lava flow in northern chile     

J. E. Guest  J. Sánchez R 《Bulletin of Volcanology》1969,33(3):778-790

A dacitic lava flow with a volume of about 24 km³ is described. This flow is the largest of three of this type which were erupted in the youngest phase of volcanism in one part of the Andes of northern Chile. The majority of volcanoes erupted during this phase are more andesitic in composition and are made up of small flows and pyroclastic materials.  相似文献   

Monte Vulture Volcano (Basilicata,Italy): an analysis of morphology and volcaniclastic facies     

J. E. Guest  A. M. Duncan  D. K. Chester 《Bulletin of Volcanology》1988,50(4):244-257

The earliest activity of Monte Vulture, central Italy, included ignimbrites but the bulk of the volcano was built up by plinian airfall deposits. Contemporaneous remobilisation of these deposits formed an apron of lahars around the base of the main cone. The volcano was constructed on a ridge; the valley to the east and tributaries to the north and south became sediment traps for volcaniclastic materials emplaced by fluvial reworking and directly from volcanic activity. To the west the valley was swept clear by active downcutting. Instability of the west flank as a result of this erosion was probably a contributory cause of major gravitational sector collapse on the volcano's flank, terminating the main cone-building phase. The resultant scar is an amphitheatre-shaped hollow called here the Valle dei Grigi. Previous workers have attributed this feature to coalescing calderas formed by engulfment. The last volcanic phase was the production of the Monticchio calderas and associated phreatomagmatic explosions producing airfall and surge deposits. Because most of the activity at Vulture has been repeated plinian eruptions producing similar assemblages of products, detailed stratigraphy of the volcano is difficult to accomplish. To characterise Vulture in terms of its products, various facies are identified and interpreted in relation to volcanic processes, distance from vent and environmental conditions.  相似文献   

The evolution of lava flow-fields: observations of the 1981 and 1983 eruptions of Mount Etna,Sicily     

J. E. Guest  C. R. J. Kilburn  H. Pinkerton  A. M. Duncan 《Bulletin of Volcanology》1987,49(3):527-540

The eruptions of Mount Etna in 1981 on the north flank and 1983 on the south flank of the volcano were of strikingly different character. The former was a short duration, high effusion rate eruption producing for the most part a simple flow-field; the latter was of relatively long duration and low effusion rate, producing a compound flow-field of overlapping flows.Despite the differences between the eruptive behaviour of these two events and the way in which the flow-field developed, both the flow-fields achieved about the same maximum length. This is considered fortuitous. The evidence suggests that the main 1981 flow stopped because the lava supply ceased and was thus volume controlled. The 1983 flow-field had a more complex history of branching, but in this case it appears that, for the longest individual flow, cooling played an important role in controlling the maximum extent of the flows.  相似文献   

Lava tubes,terraces and megatumuli on the 1614–24 pahoehoe lava flow field,Mount Etna,sicily     

J. E. Guest  C. Wood  R. Greeley 《Bulletin of Volcanology》1984,47(3):635-648

The 1614–1624 lava flow of Mt. Etna was formed during a long-duration flank eruption involving predominantly pahoehoe flows which produced unusual surface features including mega-tumuli (here defined) and terraces. Detailed mapping of the flow units, surface features, and associated tubes reveals a complex sequence of emplacement for the field. The stair-stepped terraces appear to have been formed as a consequence of self-damming of tube-fed flows which developed «perched» ponds of lava. Surges of lava through tubes elevated sections of crusted lava at the distal ends of the flow to generate tumuli, some as high as 130 m, as a consequence of pressure via «hydrostatic head» conditions within the tube. Although pahoehoe lavas and the related features described here are atypical of Mt. Etna, they may reflect styles of eruption and lava emplacement found on volcanoes elsewhere.  相似文献   

INTRODUCTION     

JOHN R. GILLIS  DAVID LOWENTHAL Guest Editors 《Geographical review》2007,97(2):iii-vi

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Madagascar Within Gondwanaland: Introduction     

M. Yoshida  Guest Editor  S. Muhongo  Guest Editor  R. Rambeloson  Guest Editor  A.S. Janardhan  Guest Editor 《Gondwana Research》1999,2(3)

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