ziggy
spending too much on rocks
Member since June 2016
Posts: 483
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Post by ziggy on Oct 29, 2016 21:26:46 GMT -5
On what may well be the last warm enough Saturday to collect at a beach on Lake Michigan, we drove a couple hours north to Point Betsie and found some interesting stuff. First off..... Anyone know what this is??? It's black and appropriately pumpkin colored (we found it just before Halloween) Then we found this chunk of a water level agate.... Another one we found.... and another one...(focus messed up) More views, water levels. Not exceedingly beautiful, but a nice find though for Point Betsie. Not sure if this next one is agate or jasper We found this, which I think is chalcedony We found agatized fossils as well I think this is pet wood but I'm nowhere near sure it is.. I have no clue what this is but it looks nice As the rock picking gods were obviously smiling down on us, on this beach which I have never found more than one Petoskey in a day, I was blessed with two of the little fellers. After a horrendous spring trip there when the water covered the entire beach and we wrote this spot off after finding nothing, we were surprised at the amount of agate there today. We also found lots of really nice unakite and other stones too numerous to mention. Point Betsie came back from the dead just in time for Halloween..
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Post by 1dave on Oct 30, 2016 10:56:13 GMT -5
NICE FINDS! Especially this one.
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ziggy
spending too much on rocks
Member since June 2016
Posts: 483
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Post by ziggy on Oct 30, 2016 18:22:03 GMT -5
NICE FINDS! Especially this one. Do you think it's pet wood? Also, do you have any idea what the first pic is?
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Post by drocknut on Oct 30, 2016 18:34:08 GMT -5
Glad you got out hounding and got some good stuff.
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Post by 1dave on Oct 30, 2016 19:43:02 GMT -5
NICE FINDS! Especially this one. Do you think it's pet wood? Also, do you have any idea what the first pic is? I seriously doubt it is pet wood. No structure to suggest that. The "pumpkin" in the first picture could be lava chunks, but that is just a guess from a distance. Some one from the area can probably identify it. Any geologists or rock clubs in the area?
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Post by toiv0 on Oct 31, 2016 5:49:43 GMT -5
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Post by toiv0 on Oct 31, 2016 6:03:01 GMT -5
I am not sure the water level agate has straigt enough lines, they follow the curve of the agate and are not straight. Here is an example.
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Post by 1dave on Oct 31, 2016 15:42:59 GMT -5
On what may well be the last warm enough Saturday to collect at a beach on Lake Michigan, we drove a couple hours north to Point Betsie and found some interesting stuff. First off..... Anyone know what this is??? It's black and appropriately pumpkin colored (we found it just before Halloween) I just downloaded a field guidebook on Meteor Crater and found I had to re-think my identifications.
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ziggy
spending too much on rocks
Member since June 2016
Posts: 483
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Post by ziggy on Oct 31, 2016 17:52:49 GMT -5
I am not sure the water level agate has straigt enough lines, they follow the curve of the agate and are not straight. Here is an example. But you can't deny my rocks resemblance to this, which has been identified as water level agate, and whose lines are also not perfectly straight. Found at the Two Hearted River, Lake Superior.
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Post by toiv0 on Oct 31, 2016 19:02:21 GMT -5
Well I am not here to argue or pis.. any one off. My thoughts are just that...thoughts. I grew up and live in the Moose Lake MN area and their are lots of ls agate. In my humble opinion if the lines don't lay flat it can't be a water level. When a person says a stone is turquoise it doesn't necessarily make it so. This is all I have to say. I apologize if I rubbed you the wrong way.
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Post by MrP on Oct 31, 2016 19:41:46 GMT -5
Well I am not here to argue or pis.. any one off. My thoughts are just that...thoughts. I grew up and live in the Moose Lake MN area and their are lots of ls agate. In my humble opinion if the lines don't lay flat it can't be a water level. When a person says a stone is turquoise it doesn't necessarily make it so. This is all I have to say. I apologize if I rubbed you the wrong way. toiv0 Also being from Minnesota I believe a water level agate has to have horizontal lines in the agate. There can be much more to the stone then just horizontal lines but if level lines are not included in the stone it is not a water level agate. IMHO ........................MrP
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ziggy
spending too much on rocks
Member since June 2016
Posts: 483
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Post by ziggy on Oct 31, 2016 19:47:15 GMT -5
Well I am not here to argue or pis.. any one off. My thoughts are just that...thoughts. I grew up and live in the Moose Lake MN area and their are lots of ls agate. In my humble opinion if the lines don't lay flat it can't be a water level. When a person says a stone is turquoise it doesn't necessarily make it so. This is all I have to say. I apologize if I rubbed you the wrong way. It takes more than a person telling me I have misidentified a rock to pis.. me off. No offense taken. Perhaps my comparison rock is misidentified as well. (Found it during a search for water level agate pics, caption under pic said water level agate found at two hearted river.) Mine is quite translucent and not chert or flint. I just assumed it was a water level agate because I've never heard that the lines must be all flat and the pic I posted and ended up using to decide my choice of what it is seems to agree. What kind of agate would you classify mine as? Or the one in the picture I posted even? I noticed you can say what it is not, but can you tell what it is? Perhaps mine is a portion of seam agate? (Although it lacks any seam following layers, instead having strangely enough, parallel lines that just happen to not be straight.) With all due respect and not trying to pis.. you off, your example lacks the translucence that agate should possess and looks more like highly polished jasper, chert or flint. If it is opaque, it is not agate. This is from the agate lady's page on agate and not agate. Chert, Jasper, and Flint -- These chemical first cousins are silica dioxide minerals, but not considered agate. They are always opaque because their microcrystals are granular and packed closer together than the fibrous structure of chalcedony. Like agate, though, can be banded with conchoidal fractures. After more research on what I actually have, I believe it is a portion of a seam agate, and not a water level agate as I first thought. I saw a seam rock in its entirety and mine looked like what could be a section of something similar. Still don't know what the one in my example pic is.
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Post by toiv0 on Oct 31, 2016 21:01:43 GMT -5
I would say yours is a fortification agate where the bands are formed around the vug. In some agates where they are broken off a bigger parent rock can give an illusion of a water level. You can have both fortification and water level in the same agate. My example was just that an example of the straight lines. I could have just as well showed a water level agate from the Stilwell ranch in TX. Where you can have plume,fortification and water level in the same stone.
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ziggy
spending too much on rocks
Member since June 2016
Posts: 483
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Post by ziggy on Nov 1, 2016 6:27:27 GMT -5
I would say yours is a fortification agate where the bands are formed around the vug. In some agates where they are broken off a bigger parent rock can give an illusion of a water level. You can have both fortification and water level in the same agate. My example was just that an example of the straight lines. I could have just as well showed a water level agate from the Stilwell ranch in TX. Where you can have plume,fortification and water level in the same stone. If that is true than it must have broken off of a HUGE fortification agate, one of a size that would be considered unlikely to exist anywhere in the great lakes.
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Post by 1dave on Nov 1, 2016 8:55:13 GMT -5
Waterline agates and waterline opals formed in the same way - silica laden water entering and drying in some kind of opening. I have viewed them in lots of Thundereggs from many angles. I just searched and found this image on the web. It is being held upside down. The red was the bottom, the hollow was the top. as liquids entered, gravity held it flat as the opal crystallized - EXCEPT for surface tension (just like around the edge of water in a glass) Here the tension wicks up around the edge, down around the coin. those same curves are in every (EDIT) complete waterline I have ever seen.
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Fossilman
Cave Dweller
Member since January 2009
Posts: 20,709
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Post by Fossilman on Nov 1, 2016 9:03:15 GMT -5
Scored some nice material there!!!
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