Tuesday, September 8, 2015

9/8/15 Report - Excellent Silver Coin Cache Found! Two Types of Treasure Coast Beaches. Tropical Depression Grace.

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

Part of Cache Find.

Here is part of a silver coin cache that was found not long ago.

Wouldn't it be fun to have all of those silver coins to go through not knowing what neat old coin might be in there. They are all neat.

That is the kind of thing you read about but doesn't come along very often.

Congratulations!  A real experience.


I received some notes from people who appreciated my 9/6/15 post.  Thanks for all the kind words.

I also got good feedback on the pistareen post.

Here is what one person said.

Thanks for sharing the link yesterday regarding the pistareens.   It is a terrific example of the positive impact that the detectorist can have in the scientific community.  It is also another example of the importance of keeping records.   You never know what value they might have to you, or someone else.

Important points!  Thanks for pointing them out.


There are two types of beach along the Treasure Coast right now.  It has been like that for quite a while.

The one type has a broad very flat beach that just slopes a little near the high tide line.  These beaches are at Pepper Park and from Blind Creek and much of the way from there down to Jensen Beach.  From Blind Creek to Jensen is a long stretch.

These beaches having a broad flat front extend way out into the water a good distance, maybe twenty yards at low tide in some places.

They are very firm and composed of fine grain sand.  Some of them are firm enough to easily ride a bicycle on them.

The flat beaches are producing some coins and objects, though they are modern for the most part, except for an occasional strip of copper or something else that is easily moved.

There is no drop off at the water's edge, but rocks, dips or whatever there is now covered by sand.  You can walk out a good distance and still be only in thigh high water.

The breaking waves create a surge that comes in over most of that flat beach.  The surge moves sand and objects that don't move are getting covered where there is enough moving sand.

The other beaches, including most of those north of Pepper Park and all the way to Sebastian Inlet have a steeper slope starting very near the water's edge.  The beach front of those beaches is mushy.  The slopes are covered by a courser grain sand.

Here is what CoastalCare.org says.  Grain size determines the slope of the beach.  Beaches with finer grain sizes tend to be flatter with gentler slopes (between the high and low tide line) than beaches with coarser grains.  The reason for this has to do with the ability of sand to absorb water (porosity and permeability) from wave swash.  Fine sand absorbs relatively little water and most of the water that flows up the beach also flows back down the beach.  This backwash tends to move sand in a seaward direction and thus flattens the beach.  Coarse sand or gravel on a beach absorbs much more of the wave swash and more water moves up the beach when a wave breaks than moves back down toward the sea.  Less backwash means fewer sand grains moving back.  In other words in a coarse sand beach the tendency is to move sand landward and pile it up in a relatively steep slope...

And here is the link.



Atlantic Activity.
Grace is now just a tropical depression, and but is on the same path.

There is a new disturbance to the north and east of the Treasure Coast that has a chance of forming but will probably not affect us.

It looks like we'll have south winds and something around a two foot surf for the next few days.

Happy hunting,