The Faunal Remains from Evron Quarry in Relation to Other Lower Paleolithic Hominid Sites in the Southern Levant     

Eitan Tchernov  Liora Kolska Horwitz  Avraham Ronen  Adrian Lister 《Quaternary Research》1994,42(3)

The mammalian assemblage and archaeological finds from the Lower Palaeolithic hominid site of Evron Quarry, situated on the northern coastal plain of Israel, are described and discussed. In their lithic and faunal composition, the sites of Latamne (QfIII) (Latamne Formation, Orontes, Syria) and Sitt Markho (Nahr elKebir, Syria) resemble Evron and are probably contemporaneous. It is suggested here, based on their lithic and faunal composition, that these sites may be chronologically closer to the site of Ubeidiya ('Ubeidiya Formation, Jordan Valley, Israel; 1.4 myr) than to the sites of Gesher Benot Ya'akov (dated as <800,000 yr B.P.), which differs in both aspects from Evron. The mammalian faunule from Evron comprises a biogeographical mixture, a result of biotic exchanges with Africa, the Oriental region, and the Palaearctic. This exchange may have been associated with a post-'Ubeidiya hominid dispersal, either from Africa or south Asia via the Levantine "corridor."  相似文献   

Telecommunications and the Large City-Small City Divide: Evidence from Indiana Cities*     

Patrick Alles  Adrian Esparza  Susan Lucas 《The Professional geographer》1994,46(3):307-316

Urban systems are increasingly dominated by large cities that house a disproportionate share of telecommunications infrastructure. This paper investigates whether telecommunications is defining a technological divide between large and smaller cities. The paper provides a conceptual basis for large-city dominance and presents the results of surveys that investigate the use of telecommunications in medium and small Indiana cities. The survey data indicate that telecommunications is used by the set of Indiana cities, but is less prevalent among the set of smallest cities. Chi-square tests, however, suggest that city size does not adequately explain these variations in use.  相似文献   

The significance of surface joints     

Adrian E. Scheidegger 《Surveys in Geophysics》1985,7(3):259-271

This brief review demonstrates the significance, on a global scale, of joints as shearing surfaces in the neotectonic stress field. Thus, the principal directions of the neotectonic stress field can be determined by a statistical treatment of joint orientation data. These principal stress directions agree with those postulated from plate tectonic theory in every case, on five continents.  相似文献   

Transport of water in frozen soil: V, Method for measuring the vapor diffusivity when ice is absent     

Yoshisuke Nakano  Allen R. Tice  Thomas F. Jenkins 《Advances in water resources》1984,7(4):172-179

A new experimental method is introduced for determining the relative magnitudes of liquid and vapor diffusion by using a small amount of soluble chemical as a tracer. The theoretical justification of the method is presented for the case where ice is absent. The feasibility of the method is demonstrated by an experiment using marine-deposited clay.  相似文献   

Fossil mammoths from Santa Cruz Island, California     

John Cushing  Marla Daily  Elmer Noble  V. Louise Roth  Adrian Wenner   《Quaternary Research》1984,21(3):376-384

Mammoth remains on Santa Cruz Island, one of the four Northern Channel Islands of California, are very sparse, in marked contrast to those reported from Santa Rosa and San Miguel Islands of the same island group. A probable major reason for this scarcity is that Quaternary deposits are greatly restricted on Santa Cruz Island. It is proposed, contrary to popular opinion, that fossils found on Santa Cruz Island were derived from animals which died on the island, and were not transported there by humans. Reasons for this conclusion are that the size and geological context of the fossils are similar to those of the largest mammoth fossils of Santa Rosa Island, and that, in spite of extensive investigations by many persons, mammoth remains have not been found in middens, either on the islands or on the adjacent mainland.  相似文献   

A device to examine the in situ response of intertidal cohesive sediment deposits to fluid shear     

Kevin Black  Adrian Cramp 《Continental Shelf Research》1995,15(15)

A self-contained, field-portable recirculating seawater flume was designed and constructed in order to measure in situ the erodibility of cohesive estuarine muds. The flume can be easily deployed by one person and is designed for subaerial use only. Bed shear stresses up to 0.6 Nm⁻² can be generated by the flume. Rates of sediment erosion are assessed in terms of the mass of particulate material eroded with time. Flow calibrations yield a drag coefficient (C_D) of 4.5 × 10⁻³ which enables single mid-depth velocity measurements to be related directly to the imposed bed stress. Water motions within the flume are complex, but secondary (radial) circulations are not considered sufficiently competent to dominate sediment erosion. Stratification effects due to high levels of suspended sediment ( 1.5 gl⁻¹) are negligible. However, the drag-reducing properties of the sediment suspension are uncertain.  相似文献   

Disposing of sewage sludge at sea     

S.H. Jenkins 《Marine pollution bulletin》1982,13(2):37-39

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A comment on the continuity equation model of slope profile development and its boundary conditions     

Adrian C. Armstrong 《地球表面变化过程与地形》1982,7(3):283-284

The constant base boundary condition used by Kirkby to derive characteristic form solutions to the continuity equation are unlikely in practice. Constant form solutions relying on constant basal erosion are however more probable.  相似文献   

Transport of water in frozen soil: I: Experimental determination of soil-water diffusivity under isothermal conditions     

Yoshisuke Nakano  Allen Tice  Joseph Oliphant  Thomas Jenkins 《Advances in water resources》1982,5(4):221-226

A new experimental method for measuring the soil-water diffusivity of frozen soil under isothermal conditions is introduced. The theoretical justification of the method is presented and the feasibility of the method is demonstrated by experiments conducted using marine deposited clay. The measured values of the soil-water diffusivity are found comparable to reported experimental data.  相似文献   

DISCUSSION OF "Shades of Immortality (Where Do We Hang the Plaque?)" by Truman Bennett, July-August 1982 issue, v. 20, no. 4, pp. 390–392     

Adrian P. Visocky  Ellis W. Sanderson  James P. Gibb  Richard J. Schicht 《Ground water》1983,21(1):4-4

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