A new and radically different model of the Earth’s structure has been proposed which explains some of the puzzling facts not dealt with in earlier models.
Dubbed ‘The Heartfire Model’, the new model has the Earth divided up into the conventional 3 layers, plus a thin crustal layer at the surface. The existence of these layers is well known from studies of the seismic waves produced by earthquakes.
In ‘Heartfire’ the outer layer (the Mantle) is made up of MORB, the ‘Mid Ocean Ridge Basalt’ found at sea-floor spreading sites and known to make up most of the modern ocean beds. This is much as in existing Earth models.
The innermost layer, the Core, consists of densely-packed neutrons. This type of matter is well-known as forming the bulk of the matter in neutron stars, and may well exist at the heart of other stars, and even in lower-mass objects like planets. This is a new concept, but no more speculative than conventional ideas about Core matter.
Between the neutron-filled Core and the Mantle is the Mesolayer, viewed as a cauldron of supercritical fluid where heavy and light elements are built up under immense pressure, from hydrogen derived from converting neutrons at the outer edge of the Core. The outermost layer of the Earth, the Crust, consists of Mantle material which has been reworked by weathering and melting and other physical processes.
Neutron conversion at the outer edge of the Core is the ultimate source of the heat that comes up from below the surface, and adequately explains how the Earth has expanded in size over its long history. It has been calculated that if all Earth’s mass was in packed-neutron form, it would form a sphere only 366 metres across.
Conversion of a packed neutron to a hydrogen atom thus involves enormous expansion, by more than a million million times, and it is this conversion which has caused the Earth to expand.
According to the model, the reason why some meteorites are of quite different composition and structure to anything found among Earth rocks may be because they were formed in a Mesolayer process in a former planet which has broken up, possibly to form the Asteroid Belt.
The full model is described at Inside The Earth — The Heartfire Model.