Ancient Earth Research Articles

Palaeomagnetism and the hypothesis of an expanding earth

In recent years, a number of authors among whom Hilgenberg, Carey, Heezen, Egyed, Wilson, Dicke, Creer and Van Hilten must be mentioned, have suggested that the earth has expanded in the course of geological time. This hypothetical expansion can be tested by means of palaeomagnetism. Various methods are available: 1. (1) the palaeomeridian method, 2. (2) Ward's (1963) method of minimum dispersion and 3. (3) the triangulation method. These methods are discussed in some detail. Van Hilten's (1963) model of earth expansion is subjected to a thorough analysis by means of spherical trigonometry. It is shown that the ancient earth radii, calculated by Van Hilten (1963), are necessarily inexact, and that some of his results are at variance with his model. All available computed ancient earth radii are evaluated. Combined with new data, compiled by the present authors, they show that only small rates of earth expansion (including a zero rate of expansion i.e., a constant earth radius) are compatible with the data. It is pointed out that the palaeomagnetic evidence for expansion can also be explained as a result of the presence of systematic errors in the palaeomagnetic inclination of sediments, the occurrence of which is also known from other sources. Large expansion rates, such as those advocated by Hilgenberg (1962) and Carey (1958) must probably be rejected. This means that reconstructions of ancient super-continents which require these large rates of expansion are almost certainly invalid.

Paleomagnetic results from the Beardmore Glacier Region, Antarctica

Abstract A paleomagnetic study has been made of thirteen oriented samples of Jurassic dolerite from sills intruding sedimentary rocks of the Beacon Group near the Beard-more Glacier (84°S, 165°E). Laboratory tests indicate a stable direction of magnetisation with a declination of 244° and an inclination of ∼75° (steeply upwards), from which the paleomagnetic pole relative to Antarctica for the Jurassic is calculated on the geocentric dipole model to have been at 59°S, 139°W: this is in agreement with results from dolerites of similar age from two other areas in Antarctica. Such demonstrations of uniformity are powerful evidence for the correctness of the geocentric dipole model for the ancient Earth's field, and for the reliability of paleomagnetic results.

Ancient Earth of Mexico Reveals New Treasure Tomb

Ancient Earth of Mexico Reveals New Treasure Tomb

Sheep fair on an ancient earth work

Journal Article Sheep fair on an ancient earth work Get access S. O. Addy S. O. Addy Search for other works by this author on: Oxford Academic Google Scholar Notes and Queries, Volume s10-VIII, Issue 196, 28 September 1907, Page 250, https://doi.org/10.1093/nq/s10-VIII.196.250c Published: 28 September 1907