Results 111 to 120 of about 9,430 (230)

Tephrochronology: principles, functioning, application

, 2011
Tephrochronology is a unique method for linking and dating geological, palaeoecological, palaeoclimatic or archaeological sequences or events. The method relies firstly and fundamentally on stratigraphy and the law of superposition, which apply in any ...
Lowe, David J.
core  

Natural and anthropogenic lead in sediments of the Rotorua lakes, New Zealand

, 2010
Global atmospheric sources of lead have increased more than 100-fold over the past century as a result of deforestation, coal combustion, ore smelting and leaded petroleum. Lead compounds generally accumulate in depositional areas across the globe where,
Hendy, Chris H., Pickett, Rachel Cara, Pearson, Lisa Kyle, L.K. Pearson, R.C. Pickett, D.P. Hamilton, C.H. Hendy, Hamilton, David P.   +7 more
core   +1 more source

Editorial: Tephra [PDF]

PAGES news, 2004
V Hall, B Alloway
openaire   +1 more source

Tephras and tephrochronology.

Journal of the Japan Society of Engineering Geology, 1989
Kazuo OHMURA, Fusao ARAI
openaire   +3 more sources

Stop 2 Kainui silt loam and Naike clay, Gordonton Rd

, 2008
At this stop are several remarkable features both stratigraphic and pedological, and a “two-storied” soil, the Kainui silt loam alongside (in just a few places) the Naike clay. Both soils are Ultisols. The sequence of tephra beds and buried soil horizons
Lowe, David J.
core  

Connecting and dating with tephras: principles, functioning, and application of tephrochronology in Quaternary research

, 2015
Tephrochronology, the characterisation and use of volcanic-ash layers as a unique chronostratigraphic linking, synchronizing, and dating tool, has become a globally-practised discipline of immense practical value in a wide range of subjects including ...
Lowe, David J.
core  

The nature, composition and distribution of sediment in Lake Rotorua, New Zealand

, 2007
Lake Rotorua has become increasingly eutrophic over the past 2 to 3 decades. The sediments of the lake have been shown to exert an important influence on this eutrophication process.
Pearson, Lisa Kyle
core  

Toba Tephra across India

, 1998
A controversy currently exists regarding the number of Toba eruptive events represented in the tephra occurrences across peninsular India. Some claim the presence of a single bed, the 75,000-yr-old Toba tephra; others argue that dating and archaeological
Westgate, John A, John A Westgate (6973058), Craig A Chesner (7963565), Pearce, Nicholas J G, Ravi Korisettar (7963562), Martin A J Williams (7963568), Williams, Martin A J, William T Perkins (7963559), Perkins, William T, Shane, Philip A R, Philip A R Shane (7963553), Subhrangsu K Acharyya (7963571), Acharyya, Subhrangsu K, Nicholas J G Pearce (7963556), Korisettar, Ravi, Chesner, Craig A   +15 more
core   +1 more source

Variable preservation of the 1991 Hudson tephra in small lakes and on land

Frontiers in Earth Science
Volcanic ash (tephra) preserved in terrestrial environments and lake sediments contains information about volcanic processes and can be used to infer eruptive parameters and frequency of past eruptions, contributing to the understanding of volcanic ...
Richard T. Streeter, Nick A. Cutler, Ian T. Lawson, William Hutchison, Lucia Dominguez, William Hiles   +5 more
doaj   +1 more source

Detection of thin tephra deposits in peat and organic lake sediments by rapid X-radiography and X-ray fluorescence techniques

, 1981
This paper reports the application of the X-ray image process of X-radiography to unopened, small diameter organic sediment cores containing thin tephra deposits. Second, a rapid technique for detecting tephra layers in peat samples by X-ray fluorescence
Hendy, Chris H., Lowe, David J., Hogg, Alan G.   +2 more
core