Results 31 to 40 of about 38,626 (306)

Crossdating Juniperus procera from North Gondar, Ethiopia [PDF]

, 2010
The application of dendrochronology in (sub)tropical regions has been limited by the difficulty in finding trees with distinct annual rings that can be crossdated.
Touchan, R., Eshetu, Z., Robertson, I., Iain Robertson, Ramzi Touchan, Marcin Koprowski, Koprowski, M., Sass-Klaassen, U., Zewdu Eshetu, Wils, T., Tommy H. G. Wils, Ute Sass-Klaassen   +11 more
core   +1 more source

Were the Larsemann Hills ice-free through the last Glacial Maximum? [PDF]

, 2001
Lake sediments in the Larsemann Hills contain a great diversity of biological and physical markers from which past environments can be inferred. In order to determine the timing of environmental changes it is essential to have accurate dating of ...
Noon, P.E., Verleyen, E., Gore, D. B., Noon, P. E., Bryant, C.L., Sabbe, K, Ellis-Evans, JC, Wood, P. B., Noon, PE, Appleby, P., Vyverman, W, Gilmour, M, Bryant, C. L., Gore, D.B., Jones, V.J., Appleby, P, Hodgson, D.A., Gore, DB, Hodgson, D. A., Bryant, CL, Verleyen, Elie, Jones, VJ, Sabbe, Koen, Wood, PB, Vyverman, Wim, Sabbe, K., Ellis-Evans, J. C., Hodgson, DA, Vyverman, W., Jones, V. J., Wood, P.B., Verleyen, E, Gilmour, M., Ellis-Evans, J.C.   +33 more
core   +1 more source

Tren kenaikan suhu permukaan laut pada abad ke-14 berdasarkan data geokimia Sr/Ca dari fosil koral Mentawai

Indonesian Journal on Geoscience, 2014
DOI: 10.17014/ijog.v5i2.96Sr/Ca content ratio in coral is a promising tool for a sea surface temperature reconstruction. In this study, Sr/Ca was analyzed from the top core of fossil coral from Central Mentawai, Indonesia (BLS).
Sri Y. Cahyarini
doaj   +1 more source

A novel subsurface sediment plate method for quantifying sediment accumulation and erosion in seagrass meadows

Frontiers in Marine Science, 2023
Sediment dynamics in seagrass meadows are key determinants of carbon sequestration and storage, surface elevation, and resilience and recovery from disturbance. However, current methods for measuring sediment accumulation are limited.
Carolyn J. Ewers Lewis, Karen J. McGlathery   +1 more
doaj   +1 more source

Selection and Treatment of Data for Radiocarbon Calibration: An Update to the International Calibration (IntCal) Criteria [PDF]

, 2013
High-quality data from appropriate archives are needed for the continuing improvement of radiocarbon calibration curves. We discuss here the basic assumptions behind 14C dating that necessitate calibration and the relative strengths and weaknesses of ...
Beck, J. Warren,, Grootes, Pieter, Reimer, Ron W.,, Blackwell, Paul G, Richards, David A, Richards, David, Manning, Sturt W., Bronk-Ramsey, Christopher, Hogg, Alan G.,, Hughen, Konrad, Richards, David A.,, Haflidason, Haflidi,, Blackwell, Paul, Scott, E. M., Beck, J Warren, Buck, C.E., Hogg, Alan G, Turney, Chris S.M., Beck, J.W., Bard, Edouard, van der Plicht, Johannes, Bard, E., Heaton, Timothy J., Kromer, Bernd, Hatté, Christine,, Manning, Sturt W.,, Hughen, Konrad A, Turney, Christian S M, Kaiser, K.F., Reimer, Paula J., Richards, David A., Van Der Plicht, J., Southon, John, Blackwell, P.G., Buck, Caitlin E., Plicht, Johannes van der,, Brown, David M., Guilderson, Thomas, P., Bronk Ramsey, C, Hughen, Konrad A., Scott, E Marian, Blackwell, Paul G., Ramsey, Christopher Bronk, Friedrich, Michael,, Blackwell, Paul G.,, Hogg, Alan G., Bayliss, Alex,, Turney, Christian, Reimer, Paula J.,, Brown, David M, Grootes, Pieter M.,, Kaiser, K. Felix, Hogg, A.G., Reimer, Paula; id_orcid, Hughen, Konrad A.,, Edwards, R. Lawrence, Guilderson, Thomas P.,, Reimer, PJ, Turney, C.S.M., Southon, John R.,, Grootes, Pieter M, Manning, Sturt W, Grootes, P.M., Hajdas, Irka,, Kaiser, K. Felix,, Reimer, Ron, Heaton, Timothy J.,, Grootes, Pieter M., Brown, David M.,, Haflidason, Haflidi, Edwards, R. Lawrence,, Southon, J.R., Southon, John R., Guilderson, Thomas P., Bard, Eduoard, Brown, David, Bayliss, A., Edwards, R Lawrence, Hogg, Alan, Heaton, T.J., Edwards, R.L., Southon, John R, Bard, Edouard,, Reimer, Ron W., Turney, Christian S.M.,, Bronk Ramsey, Christopher,, Manning, Sturt, Bayliss, Alex, Guilderson, Thomas, Heaton, Timothy, Reimer, Paula, Buck, Caitlin E.,, Friedrich, M., Hajdas, I., Buck, Caitlin, Reimer, Ron W, Friedrich, Michael, Kromer, Bernd,, Turney, Christian S. M., Guilderson, T.P., Hajdas, Irka, Scott, E. Marian,, Hatté, Christine, Kaiser, K Felix, Manning, S.W., Buck, Caitlin E, Richards, D.A., Scott, Marian E., Beck, J. Warren, Scott, E. Marian, Bronk Ramsey, Christopher, Heaton, Timothy J, Guilderson, Thomas P   +112 more
core   +1 more source

A new sampling technique for surface exposure dating using a portable electric rock cutter

Antarctic Record, 2012
Surface exposure dating using in situ cosmogenic nuclides has contributed to our understanding of Earth-surface processes. The precision of the ages estimated by this method is affected by the sample geometry; therefore, high accuracy measurements of the
Yusuke Suganuma, Hideki Miura, Jun’ichi Okuno   +2 more
doaj   +1 more source

New modeling of the Vostok ice flow line and implication for the glaciological chronology of the Vostok ice core [PDF]

, 2004
We have used new spaceborne (elevation) and airborne (ice thickness) data to constrain a 2D1/2 model of snow accumulation and ice flow along the Ridge B-Vostok station ice flow line (East Antarctica).
Ritz, C., Jouzel, J., Parrenin, F., Remy, F., Siegert, M. G., Siegert, M.J., Rémy, Florence   +6 more
core   +1 more source

Holocene Sedimentary Record and Coastal Evolution in the Makran Subduction Zone (Iran)

Quaternary, 2019
The western Makran coast displays evidence of surface uplift since at least the Late Pleistocene, but it remains uncertain whether this displacement is accommodated by creep on the subduction interface, or in a series of large earthquakes.
Raphaël Normand, Guy Simpson, Frédéric Herman, Rabiul Haque Biswas, Abbas Bahroudi   +4 more
doaj   +1 more source

New technique for surface exposure dating [PDF]

Eos, Transactions American Geophysical Union, 2012
A new technique that allows researchers to determine the amount of time a rock sample has been exposed to daylight could find many applications in geology and archaeology. The new method, pioneered by Sohbati et al., is based on optically stimulated luminescence (OSL) bleaching profiles.
openaire   +1 more source

The ground beneath our feet: A critical reflection on 135 years of landscape evolution models for southern Africa

South African Journal of Science
In his 1925 paper describing the Taung Child fossil, Dart makes various assertions about the landscape around Taung, inferring past climate dynamics, and the role these factors play in the evolution of our early prehuman relatives.
Rivoningo Khosa, Vela Mbele, Kelly Kirsten, Robyn Pickering   +3 more
doaj   +1 more source