This is an archive of CompuServe forum messages from 1985 to 1995, as saved in transcripts by John Foust.
Search Results (4,845 messages)
Geology
Message #176440
Would like to discuss the Pacific Coast Ranges with someone who has worked in the area. If interested please send me e-mail to set up a date and time. Tom
#176281-Continents in Collision
Message #176405
Jon I agree that the book is a good one. The picture on pages 84 & 85 are great but I come to a different conclusion. We are looking at a profile of the top part of the ocean basin with miles of basin to go. The basin actually rises…
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#176235-Antartica
Message #176404
Greetings Doug Ok lets look at global motion in relation to Antarctica >>From the viewpoint of Antarctica, I expect it is a case of ridges moving themselves away from Antarctica, primarily toward Australia, and minimally if at all toward Africa.>I am still trying to figure what you mean by "bowing".…
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#175715-Fold mountains
Message #176339
>>As I recall, those folds are thought by some to be related to the Applachians. Do you know how they were dated? Dating has been done w/seismic data corellated to oil wells drilled in the area. The Late Permian Wolfcamp and Leonard Formations show exotic blocks of Mississippian, Pensylvanian and…
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#Continents in Collision
Message #176281
For all who have been lurking on the recent threads about continental drift and plate tectonics, and would like to know more about the subject, I'd like to recommend a book I found at Half Price Books yesterday, called CONTINENTS IN COLLISION. It's one of Time-Life Books' series about Planet…
Mineral Collection
Message #176264
Mineral Collection for Sale A mineral collection is for sale in Adelaide, South Australia. The collection consists of; A large collection of native copper and silver many examples from Broken Hill NSW, as well as other specimens from world wide localities. A collection of Australian gold nuggets. Initial contact: Ian…
#175543-#Antartica
Message #176235
Hi, Kamron– >> Your only out is that Antarctica is not in motion and the Mid Ocean Ridge is expanding around it. I dimly recall a mention that that is roughly what is happening. I have spoken of Antarctica moving away from Australia and sideways past Africa, but that is…
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#175887-Database
Message #176233
Hi, Lanny– Argh, you had to ask about taxes. Not only must I do that almost from scratch, with extra confusion because my employer withheld tax for the wrong state, but my first issue of UV Waves (Fluor. Min. Soc. newsletter) is due at the printers that same day. With…
Reply to message #175887
#175863-Help! Books Needed
Message #176230
Howard, Thanks for your reply. I have the Sabina book on the Bancroft area, as well as most of her Min. Rec publications. The Sabina book in my want list is, in fact, out of print, but it covers the area north of Bancroft. In particular, the older book on…
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#175545-Fold mountains
Message #175904
Hi, Kamron– I guess you are talking about those rises bracketing the Panama Deep and maybe the Galapagos Islands. Is it clear they are really as mesa-like as they appear on the map? Let a number of volcanoes like the big island of Hawaii all form in a region near…
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#175546-Fold mountains
Message #175903
Hi, Kamron– Yes, the deeper the core sample the better for understanding them of course. I'll check the article again when I get moved and organized and see if it mentions a depth of sampling that I overlooked. But until someone provides a strong identification, I figure they are neither…
Reply to message #175546
#175454-Fold mountains
Message #175902
Hi, Jon– I would be a bit stirred up if Mauna Loa 'spit' rocks forcefully or a lot stirred up if it brought up continental rock. I have heard mention of volcanoes bringing up presumed mantle rock fragments, but do not recall what type of volcano that was. I have…
Reply to message #175454
#175544-Fold mountains
Message #175901
Hi, Kamron– I am packing for my imminent move back to Calif., thus my Scientific Americans are no longer arranged for a quick search of favorite articles. If my memory gets jogged about what else was in the same article, I may suddenly zero in on it; if not, remember…
Reply to message #175544
#175316-Database
Message #175887
Great Doug, Hope your return "home" goes well. As for that other reason to look forward to April…are your taxes done? Just kidding. The data is all done except for still going through it for typos. But, right now I am not sure the application will make April, figuring out…
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#175282-Fluor. Mystery mineral
Message #175864
Hi, Bill– The Fluorescent Mineral Society is working on a fluorescent color standard. Is this what Ron is involved with? If not, we need to bring certain people together… –Doug
Reply to message #175282
#175836-Help! Books Needed
Message #175863
Nathan– I don't know if the Sabina paper is still in print (GSC publications are notorious for going out of print). You may already know that there is a newer volume that covers the Bancroft area: Sabina, Ann P. 1986. Rocks and Minerals for the Collector: Bancroft-Parry Sound area and…
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#175815-Earth Space Science
Message #175838
Mike: The best organization on the national level is the National Earth Science Teachers Association (NESTA). They have a publication called The Earth Scientist. Editor Earth Scientist c/o Department of Science Lansing Community College 419 N. Capitol Avenue Lansing, Michigan 48901 Hope this helps, Chris
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#Help! Books Needed
Message #175836
Hello All! To prepare for our annual pilgrimage to Bancroft, I am looking for the following books and resource materials. I am willing to buy them or trade other books for them. If they are in the public domain, then I'd be willing to pay for photocopy charges to obtain…
#Earth Space Science
Message #175815
Thanks for responding to my note on compuServe. I am currently getting ready to graduate and teach in the schools. I was wondering if there are any professional organizations for Earth Space Science teachers? I would like to find a source of information about the field on a national level.…
#175538-Fold mountains
Message #175728
Don This thin strip of land along California brings up something. I have an observation that along the ring of fire there is a thin strip of crust all along this edge where I believe the moon was torn from the earth. This strip is obvious at california including baja,…
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#175530-Meteorite Group
Message #175719
Hi Mark, We are currently starting a meteorite group in the Astroforum. It will contain the following. An area to leave messages on that subject. A newsletter I will generate by E-mail for the group. We have twelve members but I think there may be more. I am hoping you…
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#175453-Fold mountains
Message #175717
Why do the Applachians have to be pre-Cretaceous? Good question. I believe that there are undisturbed Cretaceous sediments actually impinging on the mountains in the South, but that would only date the mountains in Georgia and Alabama. There's a (very) little Late Eocene in Vermont that seems to postdate the…
Reply to message #175453
#175454-Fold mountains
Message #175716
>> >> Has there been any drilling and cores taken in the Hawaiian Islands? >> Probably, but I do not know of them. Wake me up when Mauna Loa spits out a piece of continental crust… I gather volcanic eruptions are liable to bring up occasional stray chunks of deep…
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#175510-Fold mountains
Message #175715
>>>The Ouichita/Marathon fold/thrust belt in Oklahoma and Texas is Late Permian (Wolfcampian/Leonardian) in age.
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#175608-Mazon Creek Fossil Bed
Message #175706
Dear Gary, There's a thread running in the Dinosaur Forum from a David Corner 71033,2050 who seems knowledgable about Mazon Creek fossils. I also recall a Lapidary Journal from Jan or Feb '95 with an article about a certain Tom Cesario of Sugar Grove, Illinois, who's supposed to be somewhat…
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#Mazon Creek Fossil Bed
Message #175608
Does anyone know if the fossil beds (well, really the tailings piles from the old coal pits) down in the Mazon Creek, Illinois area are still open for collecting? If so, a phone number, contact address, etc. etc. would be appreciated. I've not been down there for (gasp!) nearly 25…
#175312-Fold mountains
Message #175546
Doug Surface samples would not prove much. What we need to see are core samples to pass judgement on the origin of these apparent crustal remnants. Kamron
Reply to message #175312
#175313-Fold mountains
Message #175545
Doug >> Note that N. America has apparently been catching up with and "eating" the northern continuation of that ridge, though S. America is the faster moving continent.> I will simply assume that plateau is a basaltic eruption from the mid-Cretaceous superplume episode or some such.
Reply to message #175313
#175314-Fold mountains
Message #175544
Doug It would be great to have access to a database of core samples from around the world. Is there anything like this anywhere? >> As I said, there was one other article that remarked there was some continental material there
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#175318-Antartica
Message #175543
Hello Doug Can you fix this title…. should be Antarctica I am close here to finally communicating the point or the problem I see in the Mid Ocean Ridge shift faults. Thanks for bearing with me. >> The southeast Indian ridge I expect is doing no shifting along the ridge,…
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#174872-#Fold mountains
Message #175538
The island(s) that will eventually be created from the California(s) coast(s) isn't necessarily going to be in the middle of anything. It's caused (apparently) by a continent enroaching on a plate that is rotating with respect to another. So what seems to be happening is that a sliver of land…
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#175330-Fold mountains
Message #175537
While I think that much of the theory about the creation of the Applachians is probably correct, I also think there are an awful lot of inconsistencies and things that need to be explained better than they are. It sort of annoys me to see probable facts that are supported…
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#175123-#Meteorite Group
Message #175530
Hi Alan, what is it? a mail list? Send details! Regards, Mark P.S. Sorry I missed you in Tuscon this year (I had to work)
Reply to message #175123
#175453-Fold mountains
Message #175511
Jon, >> But do they have to be 'pre-Cretaceous'? The timing here in West Texas is late Permian (Wolcampian/Leonardian). Jim
Reply to message #175453
#175344-#Fold mountains
Message #175510
Don, >>The difficulty seems to be that, the only available continental collision probably occurred in the late Paleozoic and there apparently isn't enough rock missing from the Applachian sedimentary sequence for the Applachians to have been in place all those years. The Ouichita/Marathon fold/thrust belt in Oklahoma and Texas is…
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#175314-#Fold mountains
Message #175454
Doug, >> >> Has there been any drilling and cores taken in the Hawaiian Islands? >> Probably, but I do not know of them. Wake me up when Mauna Loa spits out a piece of continental crust… I gather volcanic eruptions are liable to bring up occasional stray chunks of…
Reply to message #175314
#175344-#Fold mountains
Message #175453
Don, >> My problem is with the Applachians as a product of the Alleghenian orogeny. It's clear that the mountains are post Pennsylvanian and pre-Cretaceous.
Reply to message #175344
Earth Space Science
Message #175437
Looking for current Earth Space Science teachers? I need some input on the field and ideas for the classroom. Thanks!
#175317-Fluor. Mystery mineral
Message #175432
Hi, Doug– I'm pretty much satisfied with the "hydrocarbon-doped smectite" hypothesis, as it fits the environment of deposition, and there seem to be no significant objections (chemically/physically/petrologically). I'll maybe have to read up some more on smectites and hydrocarbons, just to be sure (or get hold of somebody who can…
Reply to message #175317
Mineral News back issues
Message #175430
Doug, Thanks for the help regarding the mineral news. Lanny Ream reached me and I'm all set. My thanks to everyone who responded. JT
#174648-#Fold mountains
Message #175344
I understand the hypothesis, I think. I'm a little hazy on where the original Taconics were and whether there are modern traces, But it's quite clear from the sediment sequence that there was a land mass to the East of New York in the Upper Ordovician, so I'll take that…
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#174831-#Fold mountains
Message #175330
> No big argument here either, just a qualification that the several orogenies we've discussed here which formed the mountain chain apparently proceeded from north to south over time. Devonian beds are clearly involved in the folding in northeast PA and southern New York, and these had to have come…
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#174875-Subduction & Ocean Basin
Message #175319
Hi, Kamron– >> I agree that a unified motion is what is stated but you cannot have a unified motion into and out of a large arc. Says who? All it needs is some subduction where the plate is not moving quite perpendicular to the subduction boundary. >> This is…
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#174995-#Antartica
Message #175318
Hi, Kamron– >> We predicted if this motion was present then the South East ridge would shift to the South East. This is proved by the bow in the shift faults to the SE if there is plate motion…see the bow showing progression of the location of the shift fault…
Reply to message #174995
#175037-#Fluor. Mystery mineral
Message #175317
Hi, Howard– >> Most of the kaolinite I run into doesn't fluoresce at all, at least not in long-wave. For typical fluorescences it is very sensitive to locale and impurities. Calcite may fluoresce more or less any color, and most often does not fluoresce at all. There may be one…
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#175066-Database
Message #175316
Hi, Lanny– I look forward to April already because I will be a Calif. resident again; now I have another reason for anticipation. –Doug
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#174817-#Fold mountains
Message #175315
Hi, Ed– I chose to speak of "roots" as the simplest way to refer to something getting pushed into the mantle as mountains were piled atop it and rebounding as the load was removed; I am not fussy about whether it is some inverted image of the mountains or a…
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#174873-#Fold mountains
Message #175314
Hi, Kamron– >> The key here is the geological table included in the formation. If it has the layers of time then it was crust regardless of what happened in the course of time. As I said, there was one other article that remarked there was some continental material there,…
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#174872-#Fold mountains
Message #175313
Hi, Kamron– I do not easily buy the Cook Islands Manihiki Plateau as something carved of S. America by the E. Pacific spreading ridge, because I prefer to guess S. America has been chasing that ridge since Pangaea. With subduction creating the Andes, that ridge could have moved away from…
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