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Ralph Nesbitt wrote:
"Thomas Lee Elifritz" wrote in message ... November 11, 2004 Aidan Karley wrote: The discovery of life on Mars is likely to be the product of a lot of boring, detail work, not a sudden startling discovery (particularly from the archives that have already been scanned by full-time geologists as the data is coming in). IF it ever happens. That's a word "IF", which you'll find in your dictionary beyond "certain" and before "impossible". plonk That was so easy. Thomas Lee Elifritz The gentleman makes a resonable argument against your position in his complete post. IMHO to snip a portion of an argument you aparrently are not comfortable responding to, then ignoring the balance makes you a candidate for the way you treat others that question your arguments. PLONK Ralph Nesbitt Interesting that the argument is shifting to "was there ever life on Mars" from "is there life on Mars". Also "was there ever water on mars" from "is there significant water on Mars". So the adventure goes on. |
#12
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November 11, 2004
Ralph Nesbitt wrote: PLONK Let's see if anything you post is worth reading : http://www.google.com/groups?safe=im...bitt&lr=&hl=en Let's get more specific : http://www.google.com/groups?as_q=el...bitt&lr=&hl=en Nope. Nothing much there. plonk Thomas Lee Elifritz http://elifritz.members.atlantic.net |
#13
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In article , Bob Ehrlich wrote:
Also "was there ever water on mars" from "is there significant water on Mars". So the adventure goes on. That's the way that science works (with fits and starts G). -- Aidan Karley, Aberdeen, Scotland, Location: 57°10'11" N, 02°08'43" W (sub-tropical Aberdeen), 0.021233 |
#14
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In article , Ralph
Nesbitt wrote: That was so easy. Thomas Lee Elifritz The gentleman makes a resonable argument against your position in his complete post. I wasn't even aware that Elifritz was in the discussion. He's been in my killfile for several weeks (I clear my kill file regularly, and take pleasure in reinstating the Min's of the world. I'd not noticed Elifritz before my recent return to being connected, but it took less than a week for him to find his way there. -- Aidan Karley, Aberdeen, Scotland, Location: 57°10'11" N, 02°08'43" W (sub-tropical Aberdeen), 0.021233 |
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"gresham" wrote in message ... in article , jonathan at wrote on 11/10/04 6:33 PM: Warm mineral rich hydrothermal systems are also considered to have the highest biological potential of any context. Combined with the vast deposits of iron in the form of hematite, and high concentrations of sulfates, provide a context highly consistent with sulfate reducing bacteria. Which is the type of bacteria thought to have been the very earliest to evolve. ....and high concentrations of sulfates, provide a context highly consistent with sulfate reducing bacteria.????? You got it backwards Try INCONSISTENT What? Sulfates in anaerobic conditions are ideal for sulfur reducing bacteria. "Sulfate is used as a sulfur source by many organisms; in doing so they reduce sulfate to sulfhydryl groups in organic sulfur compounds. Sulfate-reducing bacteria carry out the dissimilative reduction of sulfate to hydrogen sulfide in anaerobic environments. These organisms use organic compounds or H2 as a source of electrons to reduce sulfate." "There are some regions on the ocean floor of high biological activity. These are hydrothermal vents from which hot, mineral-rich water emanates. The water contains reduced sulfur compounds that serve as energy sources for S-oxidizing chemolithotrophs. These autotrophic bacteria perform the function fulfilled by photosynthetic organisms on the earth's surface -- they are the primary producers of the ecosystem. Dense populations of invertebrate animals are found near the vents. However, they do not eat the sulfur bacteria, but rather form symbiotic associations with them." http://cwx.prenhall.com/bookbind/pub...e-content.html JGM |
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"Jo Schaper" wrote in message ... jonathan wrote: "Nowhere known to me on earth are spherical concretions found in anywhere nearly the concentration we have been shown within the layered substrate in that Martian crater or in adjacent areas where the concretions seem to have weathered (or have been knocked) ex situ. You must not be familiar with the concentrations of cave pearls, I've seen plenty of pics of them. And every little bowl is different from the next one due to different water flow etc. And none of them have asymetrical features such as a single aperture or off-center slash, but are highly symmetrical since they were formed by moving water. When you show me a collection of pearls all showing the same unique indentations and covering an area the size of Wyoming as they do at Meridiani, then we'll talk~ BIOGENIC STRUCTURES FROM A HYPERSALINE LAKE IN THE BAHAMAS. http://www.lpi.usra.edu/meetings/lpsc2001/pdf/1068.pdf "Results and Discussion: Our FE-SEM analy-sis indicates a range of microbial life forms on the frac-tured stromatolite surfaces. Spheroidal features are the most common, with four distinct populations, charac-terized by their highly uniform intrapopulation sizes: The large spheres (Fig. 1) and medium spheres' populations (Fig. 2) are isolated from each other and the other two smaller populations. Most of the large spheres have uniform surface indentations. Most of the medium spheres are clustered together in aggregates of three or four." http://marsrovers.jpl.nasa.gov/galle...nity_m182.html "The small and tiny spheres are closely associated with each other." http://mars.gh.wh.uni-dortmund.de/me...5L6L6.jpg.html "...chemical analysis may provide additional insights into the origin of the tiny spheres. Water on the Martian surface may have formed subtidal pools formed that are similar to Storr's Lake. Stromatolites, which are essentially bacterial colonies on an enormous scale, could be the first step in life's mass aggregation in any environment where bacteria-like organisms live." where said pearls coat the floors of rooms many meters square in area, and formed when these (usually sandy) cave floors are intermittently flooded with calcite rich water. Now, near as we know, these are not aseptic locations, and the microbes there can affect the rates at which cave pearls form, but the microbes themselves do not create the pearls. |
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#20
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"Aidan Karley" wrote in message . invalid... In article , Ralph Nesbitt wrote: That was so easy. Thomas Lee Elifritz The gentleman makes a resonable argument against your position in his complete post. I wasn't even aware that Elifritz was in the discussion. He's been in my killfile for several weeks (I clear my kill file regularly, and take pleasure in reinstating the Min's of the world. I'd not noticed Elifritz before my recent return to being connected, but it took less than a week for him to find his way there. -- Aidan Karley, Elifritz partially quoted a a response by you to another post, then belittled it. The partial quote by itself without context was not rational to the thread. This he emphasized. For calling his hand for doing such, he responded with a holier than thou belittling response as if he were King/Moderator of SGG & SPP. Ralph Nesbitt |
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