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Summary:
Era of origin of life - Proterozoic
Implantation and development of life. It should not trouble you that we are called Life Bearers. We are capable of carrying life and delivering it to the planets, but we did not bring life to Urantia with us. Urantian life is unique - it originated on this planet. This realm is a world for altered life, and all emergent life was formulated by us right here on the planet itself. And in all Satania, even in all Nebadon, there is not a single world with such life as Urantia.
Description of the structure of the Earth. Continental drift continued. Under the pressure of nearly 3,500 tons per square centimeter, the Earth's core became as dense and hard as steel, and as a result of the colossal gravitational contraction at great depth it was, and still is, molten. The temperature rises as you approach the center of the Earth, where it is slightly above the temperature at the surface of the Sun.
The outer crust was about 65 kilometers long, and at a depth of 1,600 kilometers it consisted mainly of different types of rocks. Below them are the denser and heavier metals. The melting processes and high temperatures of the early and pre-atmospheric eras meant that the world was practically in a liquid state, so heavy metals sank deep into the depths of the Earth.
The thickness of the outer crust was about 65 kilometers. This outer crust rested directly on a molten basalt sea of varying thickness.
The continents today continue to float on the uncrystallized "shock-absorbing" sea of molten basalt. If it weren't for these protective conditions, strong earthquakes would literally tear the Earth apart.
The layers of lava in the earth's crust solidify to form granite. The average density of Urantia is a little more than five and a half times that of water; the density of granite is less than three times that of water. The Earth's core is twelve times denser than water.
The transition period. 450,000,000 years ago, the transition from plant life to animal life took place. This metamorphosis took place in the shallow, sheltered tropical bays and lagoons located along the coastlines of the drifting continents. And this process, all the phases of which were laid down in the original prototypes of life, proceeded gradually.
Geological annals. The vast group of rock systems that made up the world's outer crust at the dawn of life, or the Proterozoic, is now found only in rare places on Earth's surface. When it emerges from under all the accumulations of subsequent ages, only fossilized remains of plant and primitive animal life are found in it.
Fossils from this era include algae, coral-like plants, primitive protozoa, and transitional fungi-type organisms.
The average depth of this transitional layer - the most ancient sedimentary layers - is about 2.5 kilometers. In some places, such ancient rock systems reach a depth of 6.5 kilometers, but many layers attributed to this age refer to later periods.
Rocks of this age come to the surface in many places. This layer of rock - the most ancient fossil-bearing layer of crust - was wrinkled, folded and twisted in the most unimaginable ways as a result of earthquakes and early volcanic activity.
Some of the upper layers of these intercalated deposits of alluvium contain small amounts of dark shale or aspid slate, which indicates the presence of organic carbon and testifies to the existence of the ancestors of those forms of plant life which filled the Earth during the subsequent Carboniferous or Carboniferous period.
All this narrative is vividly presented on the fossilized pages of the huge "stone book" telling about the events of the past days. And the pages of this gigantic biogeological annals will surely reveal the truth to you, if only you learn to interpret them. The bottom of many seas has risen to a great height today, and their centuries-old deposits testify to the struggle for existence in those long-ago days. Literally true are the words of your poet who declared: "And the dust we tread upon was once alive."