Sandstone concretions from my local beach

[Mila]

 

 

Is this one a fulgurite?

 

 

Here are two tektites and two concretions with kind-of-similar shapes. Maybe some concretions are fossils of tektites?

[Bedrock Bob]

They aren't fossilized tektites but they are cool.

 

I have a fairly large collection of sandstone concretions. I love 'em!

 

Thanks for posting these. They are awesome.

[Mila]

52 minutes ago, Bedrock Bob said:

They aren't fossilized tektites but they are cool.

 

I have a fairly large collection of sandstone concretions. I love 'em!

 

Thanks for posting these. They are awesome.

Thank you!

 

Have you read this article 

 

http://adsabs.harvard.edu/pdf/1950PA.....58R..35L

[Bedrock Bob]

Interesting article.

Meteorites decay and terrestrialize and I suppose a tektite might do the same. It sounds reasonable that they could form the core of an concretion. Many things do.

I have found a lot of concretions with some mighty peculiar shapes. Some that seem pretty impossible. Many that look like an art project. I have always wondered what bizarre force of nature shaped and colored them like that. 

I'm a bit skeptical that anything I have seen is a petrified tektite. But I have plenty of concretions that resemble petrified alien artifacts, some petrified snowmen and a few petrified male sex organs. I'm sure there may be a petrified tektite out there somewhere too.

There is a spot nearby that produces all sorts of concretions. Most are spheres. They can be solid hematite capable of taking a polish to loose sandstone that crumbles with thumb pressure. Some have cores and others have cores within cores. Some are perfectly spherical and Some are flattened. Some have an "equator" running around them.

Some are long tapered worms running through series of spheres. Some look like little rubber ducks with a tail and a beak. Others are series of blobs and shapes a lot like a couple of yours.... Kinda like petrified bacteria colonies similar to stromatolite. 

There is a definite "style" to concretions from certain areas. Almost like they were created by different artists.

They are no doubt a big mystery. I have been fascinated by concretions and their shapes for several decades now. They are some of the nicest rocks I have ever had the pleasure of meeting.

[Mila]

1 hour ago, Bedrock Bob said:

Interesting article.

Meteorites decay and terrestrialize and I suppose a tektite might do the same. It sounds reasonable that they could form the core of an concretion. Many things do.

I have found a lot of concretions with some mighty peculiar shapes. Some that seem pretty impossible. Many that look like an art project. I have always wondered what bizarre force of nature shaped and colored them like that. 

I'm a bit skeptical that anything I have seen is a petrified tektite. But I have plenty of concretions that resemble petrified alien artifacts, some petrified snowmen and a few petrified male sex organs. I'm sure there may be a petrified tektite out there somewhere too.

There is a spot nearby that produces all sorts of concretions. Most are spheres. They can be solid hematite capable of taking a polish to loose sandstone that crumbles with thumb pressure. Some have cores and others have cores within cores. Some are perfectly spherical and Some are flattened. Some have an "equator" running around them.

Some are long tapered worms running through series of spheres. Some look like little rubber ducks with a tail and a beak. Others are series of blobs and shapes a lot like a couple of yours.... Kinda like petrified bacteria colonies similar to stromatolite. 

There is a definite "style" to concretions from certain areas. Almost like they were created by different artists.

They are no doubt a big mystery. I have been fascinated by concretions and their shapes for several decades now. They are some of the nicest rocks I have ever had the pleasure of meeting.

Maybe you could post some images of the concretions you have found? I am too fascinated by them.