Sea level once stood 6 to 9 meters (20 to 30 ft) higher than today

Long before the industrial revolution


Sea level once stood 6 to 9 meters (20 to 30 ft) higher than today

Gregory F. Fegel

The coral species that build reefs, which form atolls, are dependent on sub-surface sunlight, so the atoll-building occurs in shallow waters that are near to sea level.

During the Eemian interglacial period, between 130,000 and 115,000 years ago, the sea level rose to about 6 to 9 meters (20 to 30 feet) higher than today. Former beaches, reefs, and fossil corals that have been found high above the present tidal zone, in various places around the world, are proof of this. Many published research papers report that from around 7,000 to 6,000 years ago, during the Holocene Climate Optimum, global sea levels peaked at about 2 or 3 meters above today’s sea level.

The sea level drops as much as 400 feet during the Ice Age glacial periods, and the atoll-building corals will migrate up and down with the sea level — so we should expect to find the fossils of atoll-building corals down to a depth of 400 feet. The ability of the atoll-building corals to survive the changes caused by the Ice Age cycle — as well as various other environmental challenges during the past 500,000,000 years — shows that the corals are very resilient. In recent years, ocean acidification has been blamed for “coral bleaching”, but vertical exposure due to land uplift, which often happens in volcanic or tectonic zones, could also cause “coral bleaching”.

If major and sustained global cooling occurs, we should expect to see a drop in sea levels, the bleaching of exposed corals, and the downward migration of the atoll-building coral zone.

Earth on the Brink of an Ice Age
by Gregory F. Fegel

10 thoughts on “Sea level once stood 6 to 9 meters (20 to 30 ft) higher than today”

  1. Don’t tell the Democrats – “Earth on the Brink of an Ice Age” could be the missing Russian link.

  2. I know I’ve made comments on this board regarding just how stunted this modern Interglacial is compared to Eemian interglacial period. The solar output and orbital changes remain the same so why is it stunted.
    The difference in my view is the re-glaciations during the three separate Younger Dryas events and the following 8500K event.
    Since that event and the 3K year plateau of temperature during Holocene Maximum the temperature has trended down over the last 7000 year with another 1500 years before the Holocene reaches its glaciation tipping point.

  3. they just did a look see offshore and down deeper off the great barrier reef in aus ad found…to their amazement;-) that theres coral species down there too.
    Jo Nova from aus also did a very interesting visit to the suposedly mudflat covered reefs and found walking a bit further out(risking crocodiles) she was amid the supposedly dead/vanished corals;-)
    i do suspect the income from tourism is THE biggest issue for the govt well over the actual reef/warming drivel, and its the well off who can afford to travel to see it in the main. cost of a weeks holiday in qld is WAY HIGHER than a fortnight in bali or elsewhere all inclusive inc flights.

  4. I understand that such coral- limestone deposits are quarried for use as building stone in Florida.

  5. My family has owned property on Hood Canal since 1923.
    The boat launch and boat house that my Grandfather built in 1933 are still in the same place
    Yes there have been repairs and replacements of pieces that have rotted away but they are still right where Grandpa put them.

  6. There is some variation in the intensity of each Quaternary (the current) Ice Age glaciation, and of each warm interglacial — either of warming or of cooling — when we compare each glaciation with the others, and when we compare each interglacial with the others. The three Milankovitch orbital cycles (the eccentricity of the Earth’s orbit, the axial tilt, and the axial precession) interact with each other in a complex way to cause those variations of intensity. The average global temperature during the previous Eemian Interglacial was 1 to 2 degrees Celsius (1.8 to 3.6 degrees Fahrenheit) warmer than during the current Holocene Interglacial. That 1 to 2 degree Celsius difference is relatively small, and it is within the overall parameters of the Ice Age cycle, so it could be accounted for by the variability caused by the interactions of the Milankovitch orbital cycles.

    The Anthropogenic Global Warming alarmists warn us that an increase of 2 degrees Celsius in the mean global temperature will bring catastrophe for the environment and for human civilization. It is instructive to know that during the Eemian Interglacial, which was about 2 degrees Celsius warmer than today, the increased rainfall greened large regions of the Earth, the arctic tree line moved much further north, and the eastern half of the North American Prairie was covered with forest, due to the higher annual rainfall caused by the natural global warming. During the Eemian Interglacial, sea levels rose to 20 or 30 feet higher than today, but the loss of land caused by the higher sea level was richly compensated for by the warmer climate, longer growing seasons, higher rainfall, and the opening of former hot and cold deserts to the colonization and proliferation of plant and animal life. Today such global warming would open new lands for agriculture, pasturage, forestry, human settlement, and nature reserves.

    Earth on the Brink of an Ice Age
    by Gregory F. Fegel

  7. Drive down the Florida Keys. Pull off at some of the beach pullouts. At some of them you will note wave cut terraces a few feet above present sea level.

    For that matter, all of Florida is sand and coral limestone, deposited when it was a reef….

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