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Friday, March 10, 2023

3/10/23 Report - Gold Disc From Hoard Shows Oden. Good Article on Beach Erosion. Bigger Surf Coming.

 

Written by the TreasureGuide for the exclusive use of the Treasure Beaches Report.

Source: See Guardian link below.
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Scandinavian scientists have identified the oldest known inscription referencing the Norse god Odin on part of a gold disc unearthed in western Denmark.

Lisbeth Imer, a runologist with the National Museum in Copenhagen, said the inscription represented the first solid evidence of Odin being worshipped as early as the fifth century – at least 150 years earlier than the previous oldest known reference, which was on a brooch found in southern Germany and dated to the second half of the sixth century.


The disc, discovered in Denmark in 2020, was part of a trove containing about 1kg (2.2lb) of gold, including large medallions the size of saucers and Roman coins made into jewellery. It was unearthed in the village of Vindelev, central Jutland, and dubbed the Vindelev hoard.

Here is that link.

Oldest known reference to Norse god Odin found in Danish treasure trove | Archaeology | The Guardian

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Waves Crashing at John Brooks Yesterday.

I haven't talked much about how beaches erode lately.  I did that a lot in the past, but I've just been on others things more recently.

You can see a lot in the photo above.  You can't see so well how the water was piling up in front of John Brooks.  It wasn't so much at Walton Rocks, for example.

Notice the soft sand just up-hill of the crashing waves.

Imagine all the weight and force of all that water building up, pushing in, and moving back in the opposite direction.  And think of the building and reducing pressure in the space between grains of sand, which are loosened and then suspended and swept away to be dropped when the flow reduces enough.  One place that would happen would be on the slope of the beach.  Or, depending upon the situation, it might be on a sand bar out in the water.  

Here is an article describing some of the basics once again.

Shaping the Beach, One Wave at a Time – Woods Hole Oceanographic Institution (whoi.edu)

I'll refer to a few comments found in that report.  Here is the first.

As waves move from deep water toward the shoreline, the ocean bottom alters their direction and strength, just as a lens bends and reflects rays of light. Features such as submarine ridges, canyons, and sandbars influence the propagation of waves, just as winds are directed and focused by mountains and valleys.

That is pretty simple.  No big revelation there, but it is something to remember, and it is something we don't see directly but can tell from how the water acts.  Where a wave breaks, you know that the water has become shallow, so you do not see the sand bar or reefs, but you can often tell where they are by watching the waves break.  While the sand bars move in or out from time to time, they'll normally will remain in a pattern unless something is change, like maybe an artificial reef being constructed.  Walton Rocks, for example, has all that rock formation in front ot the beach, and that isn't going to change , and it stabilizes the beach to some extent.

But what the article doesn't talk about is what I talk about a lot, is the angle and velocity of the water on the beach.

Here is one more excerpt.

To test the sandbar hypothesis we used observations of waves and mean water levels collected at the Army Corps of Engineers’ Field Research Facility in Duck, N.C. We found that sandbars affect the coastal water levels and flooding during storms. When a sandbar is near the beach, waves break in shallow water and drive more water onto the shore. This causes flooding and allows the surf to reach dunes and manmade structures. We believe that shallow sandbars may lead to increased erosion.

Yes, it may, but it depends.  

If the water driven onto the beach carries sand and gradually slows, it will drop the sand onto the beach where it slows enough, but if the water driven onto the beach keeps moving at a fairly rapid rate, as when the water is hitting the beach at a good angle and slices along the front of the beach, the sand will be washed away.  That is the kind of erosion that causes cuts.  

You might find that article helpful.

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Source: MagicSeaWeed.com.

About time we had some winter surf.  Five to seven feet isn't bad.  Of course, there are other factors.

I often make sure to post the wind direction along with the surf height.  That is worth noticing.  

Wind speed is significant too, though. 

Good hunting,

TreasureGuide@comcast.net