|
|
Post by rockjunquie on Jul 7, 2017 13:09:36 GMT -5
I was reading that a weathered meteorite can leave a gray streak.
I was thinking that it could have been something from a ship. We know the history of the island back to about 1700. Nothing on land there can account for this, but something from a ship might.
|
|
Deleted
Deleted Member
Member since January 1970
Posts: 0
|
Post by Deleted on Jul 7, 2017 13:18:48 GMT -5
Should have said that meteorites usually don't leave a brown or gray streak  Also, what's left in the slag all depends on the ore composition, what was being smelted, how efficient was the process and what was chipped off and thrown on the waste dumps. Some slag is little more than silica/glass (non-magnetic), other contains quite a bit of metal (often very magnetic). In smelting and other processing, metal deposits build up (and are cleaned out and often discarded) in chimneys, floors, iron oxide clinker forming during forging operations, etc. Maine has a history of shipbuilding and ironworking up and down the coast, so there is an alternative (especially given past practices for using waste heaps as fill). Meteorite is always a possibility, even if a remote one, so it will be interesting to hear what her uni contacts will have to say. I find the field of meteoritics very strange. If this piece was found hot after a loud crash they would still deny it's a meteorite. That because it doesn't fit the narrow parameters they have decided defines "all" meteorites. They completely deny all other metals cannot be of meteoritic origin. Look at the map for "Goldfields Australia" it's clearly a strewn field. And the finders get a premium for their nuggets which is way undervalued if they were recognised as space origin. |
|
|
|
Post by vegasjames on Jul 7, 2017 17:39:36 GMT -5
Scroll all the way to the bottom of this website. The last entry states that meteorites are strongly magnetic and slag is not. But then again, the meteorite does not look anything like the piece your cousin found. Actually not all meteorites are magnetic. "iron meteorites", which are actually iron-nickel and pallasites are highly magnetic. And iron slags can be magnetic. So magnetism is not a good test. |
|
|
|
Post by vegasjames on Jul 7, 2017 17:45:01 GMT -5
Should have said that meteorites usually don't leave a brown or gray streak Also, what's left in the slag all depends on the ore composition, what was being smelted, how efficient was the process and what was chipped off and thrown on the waste dumps. Some slag is little more than silica/glass (non-magnetic), other contains quite a bit of metal (often very magnetic). In smelting and other processing, metal deposits build up (and are cleaned out and often discarded) in chimneys, floors, iron oxide clinker forming during forging operations, etc. Maine has a history of shipbuilding and ironworking up and down the coast, so there is an alternative (especially given past practices for using waste heaps as fill). Meteorite is always a possibility, even if a remote one, so it will be interesting to hear what her uni contacts will have to say. I find the field of meteoritics very strange. If this piece was found hot after a loud crash they would still deny it's a meteorite. That because it doesn't fit the narrow parameters they have decided defines "all" meteorites. They completely deny all other metals cannot be of meteoritic origin. Look at the map for "Goldfields Australia" it's clearly a strewn field. And the finders get a premium for their nuggets which is way undervalued if they were recognised as space origin. Except meteorites found in Australia are considered property of Australia and cannot be exported or sold without special permits. I doubt they would allow export or sale of any really rare or highly valuable meteorites. |
|
Deleted
Deleted Member
Member since January 1970
Posts: 0
|
Post by Deleted on Jul 7, 2017 19:27:55 GMT -5
I find the field of meteoritics very strange. If this piece was found hot after a loud crash they would still deny it's a meteorite. That because it doesn't fit the narrow parameters they have decided defines "all" meteorites. They completely deny all other metals cannot be of meteoritic origin. Look at the map for "Goldfields Australia" it's clearly a strewn field. And the finders get a premium for their nuggets which is way undervalued if they were recognised as space origin. Except meteorites found in Australia are considered property of Australia and cannot be exported or sold without special permits. I doubt they would allow export or sale of any really rare or highly valuable meteorites. So the narrow definition of meteorites is helping the goldhhounds of Australia! Sweet! |
|
|
|
Post by rockjunquie on Jul 12, 2017 8:11:06 GMT -5
update- based on the pictures, Bowdoin wants her to bring it in for more testing in Sept.. The suspense is killing me.
|
|
|
|
Post by orrum on Aug 1, 2017 15:18:38 GMT -5
Way cool! If the Mother ship broke up in the Andromeda Galaxy and traveled as chunks here and went thru the atmosphere and got all slagged up like that would it be considered a meterorite? This is not a joke, this is a serious question. A hypothetical question but still a serious one.
|
|
|
|
Post by vegasjames on Aug 2, 2017 3:57:15 GMT -5
Way cool! If the Mother ship broke up in the Andromeda Galaxy and traveled as chunks here and went thru the atmosphere and got all slagged up like that would it be considered a meterorite? This is not a joke, this is a serious question. A hypothetical question but still a serious one. No, it would not be a meteorite, it would be "space junk". Same with pieces of space station, rocket boosters, etc that have re-entered the Earth from space. A meteorite would be from an asteroid, moon, planetary body, etc. |
|
|
|
Post by orrum on Aug 2, 2017 5:35:52 GMT -5
Ok James that makes sense! Thanks
|
|
Also, what's left in the slag all depends on the ore composition, what was being smelted, how efficient was the process and what was chipped off and thrown on the waste dumps. Some slag is little more than silica/glass (non-magnetic), other contains quite a bit of metal (often very magnetic). In smelting and other processing, metal deposits build up (and are cleaned out and often discarded) in chimneys, floors, iron oxide clinker forming during forging operations, etc.
