Skip to main content

Index Geophysics

A geotectonic paradox: Has the Earth expanded?


Title (Dublin Core)

en-US A geotectonic paradox: Has the Earth expanded?

Description (Dublin Core)

en-US From the recognition of common apparent polar-wander (CAPW) paths for Africa, Australia, Greenland, and North America in the early Proterozoic, we have deduced that these continents today occupy approximately the same relative locations on the globe as they did in the early Proterozoic. However, there is abundant geochemical, geological, geochronological and tectonic evidence for landmasses having been much less dispersed in the Precambrian than they are now. It is shown in this paper that an Earth of about half the present radius accomodates the present continents in such a manner that this paradox can be satisfactorily resolved, and we propose that between about 1,600 Myr and 1,000 Myr ago, the Earth expanded to approximately its present dimensions. A change  from Proterozoic to Phanerozoic tectonic styles is supported.

Creator (Dublin Core)

Schmidt, P.W.
Embleton, B.J.J.

Subject (Dublin Core)

en-US Tectonics
en-US Earth expansion
en-US Paleomagnetism
en-US Data
en-US Geodynamics
en-US Solid Earth
en-US Space
en-US Theory

Publisher (Dublin Core)

en-US Journal of Geophysics

Date (Dublin Core)


Type (Dublin Core)

en-US Peer-reviewed Article

Format (Dublin Core)


Identifier (Dublin Core)

Source (Dublin Core)

en-US Journal of Geophysics; Vol 49 No 1 (1981): Journal of Geophysics; 20-25

Language (Dublin Core)


Relation (Dublin Core)