speculating, but it seems that durring the phase when the oceans were droping, it would have been arid , with high cold plains/step conditions in much of the su

speculating, but it seems that durring the phase when the oceans were droping, it would have been arid , with high cold plains/step conditions in much of the sub artic, and pockets of tundra and muskeg, all dependent on average temperature, prceipitation and topography. The turn to ocean rise would have to see increased precipitation and average temperatures, so the top layers of core samples would reflect the conditions, before the land was submerged permanently......swampy, kind of like a lot of low lying areas today.....