Search the Community
Showing results for tags 'obsidian'.
-
I have been stumped by a "rock" I found in my garden over 25 years ago. I have had a continuous need to know what it is purely for my own curiosity. It has "something" inside of it and during the years I've had suggestions of lizard eggs, man made object, etc. Ive obviously spent endless hours looking at it, and I think I've seen some kind of feathers entwined around the small round egg like masses encapsulated within the dark almost black in some light yet like sunrise in another. Its too large to float test fairly heavy makes me doubt amber but given the detail inside hard to think of alternatives.
-
To find out how early man made tools, I had to break a lotta rocks. One person said he would teach someone how to knap projectile points after they went through 200 pounds of rock and 6 months. Well, that's about how long it takes to learn how to knap reasonably well. Steve
- 17 replies
-
- 13
-
- atlatl
- flint knapping
-
(and 2 more)
Tagged with:
-
From the album: 39 years exploring Texas
Iron ore melted into glass like obsidian -
From the album: 39 years exploring Texas
Obsidian like rock from smelting metal. Found at old site where 1800s ore was processed in ft worth. -
Ferrière, L., Crósta, A.P., Wegner, W., Libowitzky, E., Iwashita, F. and Koeberl, C., 2021. Distinguishing volcanic from impact glasses—The case of the Cali glass (Colombia). Geology, 49(12), pp.1421-1425. More papers by Dr. Crosta at: Another paper about impact glasses is: Schultz, P.H., Harris, R.S., Perroud, S., Blanco, N. and Tomlinson, A.J., 2022. Widespread glasses generated by cometary fireballs during the late Pleistocene in the Atacama Desert, Chile. Geology, 50(2), pp.205-209. Yours, Paul H.
-
- cali glass
- colombia
- (and 6 more)
-
I had this in my rock collection for quite some time. I must have thought it was a nice chunk of obsidian, years ago. I was going through my rocks with my son and found myself questioning whether this could be fossilized cancellous bone. Any insights would be most appreciated.
- 2 replies
-
- cancellous
- fossilized
-
(and 1 more)
Tagged with:
-
Hi. I am trying to identify the types of rocks that these Spheres are made of. It looks like Jasper, but not sure about the rest. I haven't been able to do a mohs scale because they are polished orbs. Any help would be great. I have more pics to load. Thank you
-
Hello there, since i dont know anything about fossils in general i'd like to ask for a first opinion, if the 'stone' i found could be some kind of fossil. the interesting fact about this is, that i'm 99% sure that this is some kind of biological mass turned into stone, because it fits every aspect a small jaw, including nerves, teeth and the bone. Im curious about the material (what it turned into) and how old it might be. Thank you
-
I am figuring this “Fossil ID thing”! Please let me know if these pictures are clear enough/large enough. I see so much in this obsidian,.... but I don’t know what they are! So, is there obsidian in these fossils, or are there fossils in this obsidian?
-
I noticed some interesting rocks in the railroad bed while walking along some tracks in Illinois. I thought they looked like obsidian but one side of them has a porous, bubble looking surface that made me wonder if it was a piece of someone's countertop with old grout on the back. Most of the other rocks in the bed seem to be shale and quartzite. I also found other rocks that look like they could contain the holes made from volcanic gases. I am about to teach a unit on plate tectonics and one lesson has students compare eruptions of volcanoes with gassy and less gassy magma. If that is what these are, I thought they would be good examples for my students to examine. What do you think?
-
I found the following while the water was lowered for winter at a nearby river in Talladega County, Alabama. At first look, I thought it a broken beer bottle and picked it up to keep the kids from cutting their feet in the summer. It's about an inch or so big. But as I looked closer, it was no beer bottle. It may be an amateurish attempt to make glass, but it seems like natural obsidian to me. What intrigued me was the markings on both sides. It's obviously broken (unfortunately), but it seems to have man-made markings on it. What do you think? Partial arrowhead/tool or what???? I am sending two pictures. One from the side that seems to have ridges (like I've seen on some obsidian arrowheads) and the backside, that looks to have scrape marks. I would love any and all feedback. If it's nothing, at least I'll know...