Friday, February 13, 2015

Flint, Quartz, Sedimentary, The Movie

Flint, Quartz, Sedimentary
I find that I have come to a more intimate understanding of this rock by making the movie.  I have expanded my understanding of the location and juxtaposition of the various features.  Take a look and see what you think. It is at the bottom.


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Thursday, February 12, 2015

Yet "Closer Up"

Flint, Quartz, Sedimentary
The closer I look, the more I can see the cracks.




I can start to see granularity, too!

Flint, Quartz, Sedimentary
I did not know it was made of granules until I saw these images.  I suppose I should have recognized the possibility when I read what Wikipedia said.  "It occurs chiefly as nodules and masses in sedimentary rocks, such as chalks and limestones."  It is "categorized as a variety of chert."  I think that this rock may have come from Flint Ridge by Newark, OH.  It might be a scrap I bought from Pam Lauer.

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Wednesday, February 11, 2015

Flint, Quarts, Sedimentary

Flint, Quarts, Sedimentary
I can see the fractures, cracks, in the rock.

Flint, Quarts, Sedimentary
I can see where the quartz bearing liquids flowed in.

Flint, Quarts, Sedimentary
I think that the color red comes from iron bearing liquids.  Anyway, that would be my guess.  What beautiful designs!

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Tuesday, February 10, 2015

Bling?!

Flint, Quartz, Igneous
This rock does not have the outward look of a geode.  This opening in it does, however; look like the inside of a geode.  It has crystals.  Wikipedia says that geodes can form either by volcanic activity, crystals form as the liquid cools. or sedimentary filling of openings in the rock, not hot, by liquids which crystallize as the water evaporates.  

Wikipedia. says, "Flint is a hard, sedimentary cryptocrystalline form of the mineral quartz."  No wonder I thought the white may be quartz, it is!  Wikipedia also says,  "The exact mode of formation of flint is not yet clear but it is thought that it occurs as a result of chemical changes in compressed sedimentary rock formations, during the process of diagenesis."  It is sedimentary rock, not metamorphic, because diagenesis connotes heats not great enough for metamorphosis to occur.  I should have named this "sedimentary" not "igneous."

Flint, Quartz, Igneous
I tossed this rock into the the tumbler several years ago.  I had not seen the aspect of the geode in it.  I removed it from the the "load" when I changed grit and had a better look.  I think I can see detritus from the tumbler in among the crystals.  I might try to blow it out or wash it out.

Flint, Quartz, Igneous
Did you know that crystals such as these, not these, are diamonds and they come out of the ground.  I think these are quartz crystals.  How interesting! 

I have tried to say what I know to be true about this rock.  I am open to corrections.


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Monday, February 9, 2015

Next Step

Flint Quartz Igneous
A closer look reveals more details.  Here we have a hole creating mystery.  We have the color white(ish).  We have yellow or orange and we have cracks, fracturing.  

Could the hole contain bling?  It almost looks like it.

Flint Quartz Igneous
An aside:  I would greatly appreciate input from my "rock hound" friends or anyone else!

An added color on this side is red.  To summarize color we have three: white, orange and red.

Flint Quartz Igneous
 Look at that fracture in the lower left center!  What is the origin of the red lines?

Flint Quartz Igneous
What interesting shapes and designs!

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