In order to use seismological data to learn about the structure of the Earth we have to understand the formation of the Earth. In particular the creative act on the 2nd day which was the inception of gravity.
The enigmatic fossil Prototaxites /ˌproʊtoʊˈtæksᵻˌtiːz/ shows us how THE NARRATIVE forces "scientists" to dream up nonsense (inductive reasoning). It's a pinnacle in scientific blindness.
In the Biblical narrative of Matty's Paradigm, at the time when gravity was created, super-sized bacteria existed in an iron-rich aquatic environment before an Oxygen-rich atmosphere formed.
They key to understanding the inception of gravity as the creative act of the second day is the synchronicity between stretching out the heavens and establishing the foundations of the Earth. One command did both.
In the Matty's Paradigm narrative cellular life originates in water in zero-G, before there was an atmosphere. Here's some science lingo attempting to explain super-sized prokaryotic cells in an environment with no oxygen.
If life began in a zero gravity environment on the first day, then the unicellular and multicellular life forms would have reached exceptionally large size as compared to similar organisms grown in gravity.
By the end of the first day light was trapped in a watery mass teeming with biological life. It was the primordial soup that popular science (SciPop) predicts was the cradle of life. It was a zero-gravity environment.
There are three things that we use to deduce that gravity as created on the 2nd day, which means that the during first day, and the time before it, there was no gravity in the universe.