Sentences with phrase «in paleomagnetic»

A large number of such data have been produced over the past decades in paleomagnetic laboratories around the world, so that the amount of available data is getting large enough to allow for global inversion models of the Holocene magnetic field.

Not exact matches

Angrites are igneous rocks, many of which are thought to have erupted onto the surface of asteroids very early in the solar system's history and then quickly cooled, freezing their original properties — including their composition and paleomagnetic signals — in place.

Paleomagnetic dating — matching magnetic properties in the sediments surrounding a fossil or artifact to ancient reversals in the Earth's magnetic poles to determine age — later determined the tools had to have been made 3.3 million years ago.

The age of the fossils was corroborated by radiometric dating (using radioactive isotopes), the global paleomagnetic sequence (signatures of reversals of Earth's magnetic field found in the samples), and fossil correlations (age of other fossils).

Researchers, led by Yohannes Haile - Selassie co-authored a paper in the Proceedings of the National Academy of science (PNAS) reporting the discovery, piecing together and analysis of a partially complete male skeleton dated by paleomagnetic and radiometric methods to 3.6 million years ago.

The researchers say Rising Star Cave was dated using a combination of optically stimulated luminescence of sediments with uranium - thorium dating and paleomagnetic analyses of flowstones to establish how the cave sediments relate to the geological timescale in the Dinaledi Chamber.

Joseph L. Kirschvink et al., «Paleomagnetic Evidence of a Low - Temperature Origin of Carbonate in the Martian Meteorite ALH84001,» Science, Vol.

Further advances in understanding the acquisition of magnetisation in archeo - and paleomagnetic data, continuing development of improved laboratory procedures and further investigations of suitability and appropriate scaling of sedimentary relative intensity records will help to reduce uncertainties in the data, and consequently also in the models.

Information about the magnetic field evolution prior to the times of direct observations is determined in laboratory procedures from archeo - and paleomagnetic material.

It's attractive in that it explains several lines of otherwise problematic evidence (near - ubiquitous glacial sediments, including many in paleo - low latitudes as indicated by paleomagnetic studies, overlain by equally ubiquitous «cap carbonates» (resulting from a CO2 insolubility spike at Snowball Earth termination).

Sohl, L.E., N. Christie - Blick, and D.V. Kent, 1999: Paleomagnetic polarity reversals in Marinoan (ca. 600 Ma) glacial deposits of Australia: Implications for the duration of low - latitude glaciation in Neoproterozoic time.