Behavior of Drift Wood and Its Dam up Process

1994 ◽  
Vol 38 ◽  
pp. 543-550
Author(s):  
Hajime NAKAGAWA ◽  
Kazuya INOUE ◽  
Masaaki IKEGUCHI ◽  
Takaki TSUBONO
Keyword(s):  
2003 ◽  
Vol 50 (11) ◽  
pp. 530-536 ◽  
Author(s):  
Yuta Miyakawa ◽  
Fumio Miyagawa ◽  
Yoshitaka Nishiyama ◽  
Kiyoshi Mura ◽  
Chiyoko Tokue
Keyword(s):  

1866 ◽  
Vol 5 ◽  
pp. 600-614 ◽  
Author(s):  
W. C. M'Intosh

The surface of the island is less richly supplied with animal life than the ocean, and, indeed, with vegetable likewise. The grass is coarse and stunted, and even the hill tops are boggy; while the sea border has rich crops of Fuci, Laminarise, and other sea-weeds, and harbours hosts of animals, both vertebrate and invertebrate. The inhabitants seem to take certain of the circumstances in which they are placed to the best advantage. Kelp is manufactured from the sea-weeds; the drift-wood makes the framework of their hovel roofs, and is applied, besides, to many other useful purposes; while fishing is universal. The soil, again, on the eastern side, with a single exception, is cultivated with neither vigour nor profit, the islanders having a tendency to be a pastoral and fishing, rather than an agricultural race.


2012 ◽  
Vol 63 (5) ◽  
pp. 399-405 ◽  
Author(s):  
Alexander Lukeneder ◽  
Achim Bechtel ◽  
Reinhard Gratzer

Abstract Information is provided about organic-matter bearing sediments and fossil drift-wood from the Puez area (Col de Puez, Southern Alps) near Wolkenstein (S. Tyrol, Italy). The locality is located on the Trento Plateau which represents a submarine high during the Lower Cretaceous. Its terpenoid hydrocarbon composition indicates that the wood fragment derived from a conifer belonging to the family Podocarpaceae or Araucariaceae. Intense degradation of OM argues for lengthier drifting. Long-term drifting is also indicated by the infestation of the bivalve Teredo (“shipworm”). The finding of a fossil tree trunk sheds some light on the early Lower Cretaceous tectonic history of the Trento Plateau and the Dolomites.


1875 ◽  
Vol 8 ◽  
pp. 68-69
Author(s):  
R. W. Thomson

The author commences by adverting to a very generally recognised geological difficulty—viz., that of accounting for the disappearance of the mineral from the carbonaceous matter in the processes which have resulted in the formation of coal-beds as we now find them. Coal-beds have undoubtedly their origin from decaying vegetable matter; and the deposition is unquestionably traceable to at least three different sources—viz., the carrying down by rivers of drift wood, and its deposition in deltas and estuaries at their mouths; the accumulations of dead forest trees, &c., falling for successive generations where they had grown; and the growth of peat. But in all of the three methods it is clear that the vegetable matter must have been mixed up to a very large extent with earthy matter, which earthy matter has since disappeared, so as to leave carbonaceous deposits in a comparative state of purity. The explanation of this disappearance has hitherto completely baffled geological ingenuity, and the author, in offering the present solution of the enigma, ventures to hope that he has successfully grappled with the difficulty.


1892 ◽  
Vol 24 (5) ◽  
pp. 112-112 ◽  
Author(s):  
W. Hague Harrington
Keyword(s):  

In the March number of Entomological News Dr. Horn records the capture at St. John, N.B., of Carabus nemoralis, Mull, by Mr. C. B. Riker in April or May, 1891. I can confirm the occurrence ot this species in the locality mentioned and can add from it a second species to our lists. On the 6th Sept, 1891, having the forenoon to spend in St. John I made a visit to the celebarated falls which pour up or down the river, according to the state of the tides, for which the Bay of Funday is noted. I spent about half an hour searching for Coleoptera, and among the Carabidæ found under drift wood were two species of Carabus.


2008 ◽  
Vol 52 ◽  
pp. 679-687 ◽  
Author(s):  
Yoshifumi FUJIMORI ◽  
Yuki OCHI ◽  
Shoko HAYAMA ◽  
Hiroshi SHIRAISHI ◽  
Masahiro WATANABE
Keyword(s):  

2019 ◽  
Author(s):  
Fiona Petchey ◽  
Patrick V. Kirch

AbstractRadiocarbon dating Pacific archaeological sites is fraught with difficulties. Often situated in coastal beach ridges or sand dunes, sites exhibit horizontal and vertical disturbances, while datable materials such as wood charcoal are typically highly degraded, or derived from old trees or drift wood and bone collagen rarely survives in the tropical conditions. Shell, therefore, is the most logical material for dating Pacific sites since it is resistant to alteration, can be sampled to ensure only the last few seasons of growth are represented and is often closely tied to human economic activities. However, shell radiocarbon (14C) dating has been plagued by interpretive problems largely due to our limited knowledge of the 14C cycle in near shore marine and estuarine environments. Consequently, shell dates are typically ignored in regional chronometric evaluations and often avoided for dating altogether. Recent advances in our understanding of the source of shell 14C content as well as the development of the first South Pacific Gyre model of changing marine 14C over time, combined with Bayesian statistical modelling, have now provided us with insight into the value of these shell radiocarbon dates, enabling a revision of the age of the To’aga site on Ofu Island, an early occupation site associated with the initial Polynesian Plainware period in Samoa, the earliest use of which is now dated to between 2782 and 2667 cal BP.


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