Monday, August 5, 2019

8/5/19 Report - Beaches and Old Treasure: An Illustration. Fall Sedwick Auction: Lots and Talks.



Written by the TreasureGuide for the exclusive use of treasurebeachesreport.blogspot.com.

Hypothetical Beach Profile.

On the above illusteration the color brown represents the surface of the sand on a hypothetical beach; blue represents the water level; grey the level of the deepest previous erosion; black, bedrock; and yellow, old treasure deposits.

You do not find high dunes behind all beaches, but the old materials found in the high dunes is usually a foot or more deep.

The high dunes were created by sand blowing back from the beach, which continues to happen even if the front of the dunes erodes.

When the beach erodes, old items can end up on the new lower surface, and then later be covered again by accumulating sand.

The same happens in the water.  When sand is moved, items can sink, eventually reaching bedrock.  Of course the rock is not flat like it is shown in the drawing.  It periodically gets covered and uncovered.

The deeper the treasure goes, the less often it will be uncovered. by natural forces.  Of course blowers are used to remove the sand in the water.

Treasure from the ocean can be washed up onto the beach, but it has to get uncovered first.

There is an area of heavy churning right in front of the beach, where waves often break.

Erosion can expose treasure from the back dunes, main beach, or in the water.  Occasionally, but rarely, storms expose treasure from all three, removing sand from the front beach, main beach and cutting into the dunes.


Sand to the right and above the orange line (shown above) could be removed without getting down to any older treasure,  Some spots are closer than others.


Here is an example of a common type of erosion (orange line) that would expose some treasure.

I'm just talking here about uncovering previously deposited treasure,  I'm not talking here about treasure that is moved either from the dunes. along the surface, or from the water onto newly exposed surfaces.

For treasure to be washed up onto the beach, the sand has to be moved enough to uncover treasure.  For the treasure to wash onto the beach, lowering of the front beach helps tremendously.  Lowering the front beach permits more water force to hit farther back on the beach.

---


Sedwick Auction 26, to be held on Nov. 1 and 2, is shaping up. While it is still not too late too consign, here are some of the lots and talks that are already scheduled.

Some Featured Collections

- The John Pullin Collection of dated Mexican silver and gold cobs, most with 1715 Fleet origins

- The "Classics" Atocha Collection of quality type coins from the Atocha with original certificates

- The Santander Collection of Colombian proclamation medals

- A selection of gold and silver bars recovered from shipwrecks like the Atocha and the "Golden Fleece"



Numismatic Talks (Oct. 31st)

- Collecting 1715 Fleet Coins by John Pullin

Longtime collector and numismatist John Pullin discusses his years of experience collecting and enjoying gold and silver cobs from the 1715 Fleet.

- The East India Route by Gavin Clackworthy

An overview of shipwrecks along the East India route presented by Gavin Clackworthy, a well-known South African salvager famous for recoveries from wreck sites like Joanna, Cabalva, Bredenhof, and Hartwell, among others.



---

The National Hurricane Center map is now clear of any developing systems in our part of the world.

The tides on the Treasure Coast are still big, but the surf is still only one or two feet.

Happy hunting,
TreasureGuide@comcast.net