The ocean's early tidal waves hit proto continents like nothing we can image. Back then (actual, like 90% of Earth's history) the only thing sculpting Earth was tectonics, gravity, water, wind and temperatures. There was mountains and vast expanses of braided-stream tidal plains on growing continental shelves, that and huge endless oceans.
Realize the early moon was very close, orbiting around a much faster spinning Earth. With time the moon receded, all that drag slowed down Earth's orbit and the tides became increasingly toned down.
Still, imagine those early eons with intense currents and "tidal bore waves" that were dozens of meters tall, (if not hundreds, very early on), raging in and out for hundreds of miles, twice daily. That was right here on this planet, it's an awesome thing to mull-around in your mind. Almost like a global crushing plant in the first stages of mineral processing and refining.
Very early in Earth's life, during the final stages of formation by accretion, it received the biggest impact of all, namely Theia, (or perhaps it was a couple smaller theia's), which subsequently produced a new Earth; radically changing the planet's core as well as its atmosphere; and producing the moon with it's extraordinary influence on Earth from that moment forward.
Earth's Geomagnetic (force) Field
Geomagnetic Reversals and excursions: The origin of Earth's magnetic field.
Bruce Buffett | SETI Institute | 1:00:20
Published on Oct 16, 2015
Palaeomagnetic observations offer important insights into the origin of Earth's interior, but a detailed reconstruction of the underlying dynamics is not feasible. A practical alternative is to construct a stochastic model for the time evolution of the dipole field. ...
Dr. Buffet will explain how a physical interpretation of the stochastic models suggests that reversals and excursions are part of a continuum of time variations in Earth's magnetic field, arising from convective fluctuations in the core. Relatively modest changes the amplitude of convective fluctuations can produce large changes in reversal rates, including the well-known occurrence of superchrons lasting longer than 10 million years.
Uploaded on Dec 18, 2010
The objective of the Swarm mission is to provide the best ever survey of the geomagnetic field and its temporal evolution, and gain new insights into improving our knowledge of the Earth's interior and climate.
The Swarm concept consists of a constellation of three satellites in three different polar orbits between 400 and 550 km altitude. High-precision and high-resolution measurements of the strength and direction of the magnetic field will be provided by each satellite.