Strom Large Featured

Stromatolite Rocks ~ Large

This page shows large Stromatolite rocks.   By large, I mean anything over 10 pounds and up to 83 pounds.   I have not yet documented and uploaded the 83 pound one.     I can’t do an sg test since it’s too heavy for me to handle, and I roll it around on the carpet to move it.

Almost all of these rocks are Jasper, or a combination of Jasper, Quartz and Agate.   A few are Chert.   The majority have never had slices taken from them due to the fact I only have a 10″ rock saw.   But, most have been looked at with my Inspection AmScope, and they appear to have Stromatolite material in them.

As luck would have it, I have found smaller versions of most of these rocks on my property.   That has allowed me to take thin slices of all material shown below.   Please look carefully at the rocks to see the concentric rings and other markings.   If you recognize something, send me a note.

Almost all of these rocks had a tiny section exposed above ground and it took quite a bit of effort to get them dug-out and hand-trucked to my patio area where I could wash and inspect them.   In some cases it took me days to clean them and to realize what I had.

I found most of these in 2011 and immediately realized I had fossils of some sort.   I still find them on occasion, but they have to work their way up now since I have gone over my entire 5.5 acres with a fine-tooth comb.   Within about 6 months time I knew they were Marine in nature, but I still didn’t know what kind they were.   I had a small rather lousy microscope and I could see they all contained similar formations,  but that was it.    Plus they all had similar markings, designs, colors and configurations on the exterior.

So here are the “Big Guys.”   I have only posted some of the more interesting ones; I have several dozen more that I am not showing.   Many I have not cleaned and they are too dark to photograph.   Some are just too  big for me to handle.

Each section for a  specific rock starts out with a large thumbnail so you can tell it’s a new rock.   The first one is a Banded Iron Formation (BIF) and differs from the rest in the type of rock.    I am also showing thin-slice pictures for this specimen that according to the experts, is not supposed to be found in my area.

If and when I take slices from the examples below, and they show to not be stroms, I will remove them from this page.   Enjoy.

“BIF” OR BANDED IRON FORMATION

Orsten-type Microfossils Orsten-type Microfossils Orsten-type Microfossils Orsten-type Microfossils Orsten-type Microfossils Orsten-type Microfossils Orsten-type Microfossils Orsten-type Microfossils Orsten-type Microfossils

THESE ROCKS LOOK TO BE VOLCANIC,  BUT THEY AREN’T.   THEY HAVE STROMATOLITE MATERIAL.

Orsten-type Microfossils Orsten-type Microfossils Orsten-type Microfossils

SLICES HAVE BEEN TAKEN FROM THE TWO LIGHT AND DARK MUSTARD ROCKS BELOW.   THEY ARE STROMATOLITES AS I FIRST REALIZED IN 2011.

STROMATOLITE ROCKS 2002 AND 2006

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Orsten-type Microfossils Orsten-type Microfossils Orsten-type Microfossils Orsten-type Microfossils

I HAVE NOT YET TAKEN SLICES OFF THE ROCKS BELOW.   THEY SHOW LAMS ON THE RIND BUT I WON’T KNOW UNTIL AFTER CUTTING.

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Orsten-type Microfossils Orsten-type Microfossils Orsten-type Microfossils Orsten-type Microfossils Orsten-type Microfossils Orsten-type Microfossils Orsten-type Microfossils

Orsten-type Microfossils Orsten-type Microfossils Orsten-type Microfossils Orsten-type Microfossils Orsten-type Microfossils

Orsten-type Microfossils Orsten-type Microfossils Orsten-type Microfossils Orsten-type Microfossils

Orsten-type Microfossils Orsten-type Microfossils Orsten-type Microfossils Orsten-type Microfossils

Orsten-type Microfossils Orsten-type Microfossils Orsten-type Microfossils

 

Orsten-type Microfossils Orsten-type Microfossils

Orsten-type Microfossils Orsten-type Microfossils Orsten-type Microfossils Orsten-type Microfossils

Orsten-type Microfossils Orsten-type Microfossils Orsten-type Microfossils

Orsten-type Microfossils Orsten-type Microfossils Orsten-type Microfossils

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Marine Fossils Found in Southern Oregon