Home, Sweet Home, Dream becomes Reality |
Home, Sweet Home, Dream becomes Reality |
Feb 9 2006, 03:04 AM
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#91
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Senior Member Group: Members Posts: 2997 Joined: 30-October 04 Member No.: 105 |
This is a fine-grained indurated rock, and until we know the mineraoloy, that is all we can say.
One thing noteworthy: looking at Alan's RGB image of the slope at Homeplate posted today, the color of the dark toned rocks is a medium gray, with no trace of the usual ocher dust hue. Unusual because _everything_ here is dusty and itis odd to see rocks without that warm hue. --Bill -------------------- |
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Feb 9 2006, 03:07 AM
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#92
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Senior Member Group: Members Posts: 1229 Joined: 24-December 05 From: The blue one in between the yellow and red ones. Member No.: 618 |
QUOTE (imipak @ Feb 8 2006, 01:39 PM) "Well... it's rock, isn't it?" /Arthur Dent snip And really the darker, upper material *does* seem (to me) to be made up of sand-grains sized particles. snip If you're talking about the upper left quarter of the frame, I assume that is sand, blown onto this slab. The little yellow square represents the sort of view I assume this is (inverted, of course). The actual rock seems to consist of a very-fine-grained matrix, perhaps enclosing some coarse granular clasts. Hence "smooth lumpy stuff". So much of the Meridiani evaporite had a similar look: http://qt.exploratorium.edu/mars/opportuni...44P2953M2M1.JPG Sure, the resemblance can be entirely superficial, representing entirely different constituents and origins...still...others have noted the similarity of HP and Burns Cliff on a macro scale. think...gotta think about it... -------------------- My Grandpa goes to Mars every day and all I get are these lousy T-shirts!
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Feb 9 2006, 03:08 AM
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#93
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Senior Member Group: Members Posts: 1636 Joined: 9-May 05 From: Lima, Peru Member No.: 385 |
QUOTE (jamescanvin @ Feb 8 2006, 09:11 PM) According to the above picture, I still have no good idea about how these around 25 degree slope of inclination are formed. As an example, the Endurance Crater has slope due to the impact crater and we can see the cross bedding as the ones of Home Plate. My best guess is that the Home Plate was formed by the accumulation of "limestones" produces by the hot water spring over thousand years (I don't think it is build up by millions but thousands years). But, this guess does not seem to be a strong since I cannot explain well about how the limestones were grown up if the water flush away on its borders. Maybe, a strong explosion from the nearby volcano at about 170-200 km north west of Gusev at Latitude : 7.5°S, Longitude : 187.2°W and has 5 km of Martian daturm: a Apolinaris Patera was erupted about 3 billions years ago (Hesperian age 3.5 Billions to 1.8 Billions years) and continued intermittently throughout the Hesperian period. The Spirit landing site is located near 14.8°S, 184.6°W. The initial effusive lava flows that formed the lower part of the dome were followed by more explosive eruptions of pyroclastic rocks and lavas to build the upper, steeper part of the structure. Depletion of the magma chamber by these eruptions or by withdrawal of the magma produced roof collapse and a large caldera. The last eruption from Apollinaris filled the caldera floor and overflowed from a narrow notch in the south wall of the crater. The above picture shows the flows of lava and probably the ash will go to toward southeast where is located the Gusev crater. Mars_Global_Surveyor_MOC2_838_Release.html ( 2.88K ) Number of downloads: 473 Thus, to explore the region of Apollinaris Patera will provide important informations on the past volcanic activity on this region of Mars, and its different phases. Interaction between volcano and ground-ice is also visible in this region. Throughout the growth of the volcano, magmatic heating heating by dikes and other conduits, as well as by lava flows, melted ground ice within the regolith. The resulting desintegration and collapse of the terrain continued into the Late Hesperian and formed cluster of chaotic hills and mesas. Floods from Ma'adim Vallis, a large channel south of the map area, contributed to the breakup of surface rocks. Anyone have a better explanation about the formation of HP cone? Rodolfo A mew update after reading the last post of DFinrock (David), I am able to explain about the formation of HP cone. Good David. Now I am not suggesting that there was a cave involved. But cold water with lots of dissolved minerals would evaporate very quickly in the thin Martian atmosphere. And the fine-grained mineral deposits should build up steadily. Any sort of mineral spring, hot or cold, should be able to do the job. David |
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Feb 9 2006, 04:32 AM
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#94
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Member Group: Members Posts: 166 Joined: 20-September 05 From: North Texas Member No.: 503 |
QUOTE (RNeuhaus @ Feb 9 2006, 03:08 AM) Anyone have a better explanation about the formation of HP cone? Rodolfo A new update after reading the last post of DFinfrock (David), I am able to explain about the formation of HP cone. Good David. But as Bill noted, we shouldn't make any assumptions about the type of rock until we know the mineralogy. It sure *looks* like CACO3... but looks can be deceiving. David |
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Feb 9 2006, 05:43 AM
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#95
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Member Group: Members Posts: 233 Joined: 21-April 05 Member No.: 328 |
Posts have been added so rapidly here that I may seem to be fairly far downstream from an earlier post by Dvandorn regarding the almost religious awe that these images inspire in him, but I would like to second his notion -- without lending any credence to "ID" -- that it is this kind of science which for many of us best expresses our spiritual yearnings.
And yes, some of this Home Plate stuff is very remeniscent of Meridiani! |
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Feb 9 2006, 05:46 AM
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#96
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Member Group: Members Posts: 233 Joined: 21-April 05 Member No.: 328 |
P.S. Any Teilhard de Chardin fans out there?
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Feb 9 2006, 06:11 AM
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#97
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Member Group: Members Posts: 356 Joined: 12-March 05 Member No.: 190 |
How come a few miniTES samples haven't been taken/shown. They would be able to rule out something like CaCO3 immediately and they only take seconds to perform. Come to think of it, I can't remember the last time a miniTES data mosaic or spectrum was released in a press release. Its still working right? Last I heard the aluminum band around the piece of KBr beamsplitter that was supposed to crack it over the winter because of mismatched termal expansions never happened.....sooo
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Feb 9 2006, 06:12 AM
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#98
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Senior Member Group: Moderator Posts: 2262 Joined: 9-February 04 From: Melbourne - Oz Member No.: 16 |
This looks good
CODE 748 p2271.05 72 0 0 72 2 146 pancam_Gibson_col_1_2_3_4_L257R127
748 p2272.05 36 0 0 36 2 74 pancam_Gibson_col_5_6_L257R127 -------------------- |
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Feb 9 2006, 06:37 AM
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#99
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Senior Member Group: Members Posts: 2228 Joined: 1-December 04 From: Marble Falls, Texas, USA Member No.: 116 |
QUOTE (Bill Harris @ Feb 8 2006, 09:04 PM) This is a fine-grained indurated rock, and until we know the mineraoloy, that is all we can say. ... --Bill Well said. It's hard to say much else at this point. The rampant speculation is unwarranted. I share in the excitement this place induces in all of us. It's amazing. But we really need more info. -------------------- ...Tom
I'm not a Space Fan, I'm a Space Exploration Enthusiast. |
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Guest_Richard Trigaux_* |
Feb 9 2006, 07:53 AM
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#100
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Guests |
QUOTE (glennwsmith @ Feb 9 2006, 05:43 AM) Posts have been added so rapidly here that I may seem to be fairly far downstream from an earlier post by Dvandorn regarding the almost religious awe that these images inspire in him, but I would like to second his notion -- without lending any credence to "ID" -- that it is this kind of science which for many of us best expresses our spiritual yearnings. And yes, some of this Home Plate stuff is very remeniscent of Meridiani! I would like to second this post too. Let us forget "beliefs" and especially dogmatism (or worse). My own spiritual life also feeds on the marvels of science results, especially of space exploration. When I was a kid, Mars was still drawn with the Schiaparelli "channels", and Titan was just a spot, I even ignored its name. I would have never dreamed to see one day a robot bringing back pictures of Mars rocks or Titan rocks... |
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Guest_Richard Trigaux_* |
Feb 9 2006, 07:56 AM
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#101
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Guests |
QUOTE (CosmicRocker @ Feb 9 2006, 06:37 AM) Well said. It's hard to say much else at this point. The rampant speculation is unwarranted. I share in the excitement this place induces in all of us. It's amazing. But we really need more info. Agree too. My preference goes to evaporites, but it could be something entirely new. |
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Feb 9 2006, 08:37 AM
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#102
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Senior Member Group: Members Posts: 1229 Joined: 24-December 05 From: The blue one in between the yellow and red ones. Member No.: 618 |
"A Rat, a Rat, my KINGDOM for a Rat!"
(Insert emoticon for royally-tormented frustration) What would happen if we brushed and brushed and brushed this rock? Would we eventually peel off the surface layer and see what's inside? Or is there nothing inside - just what's on the outside, like Doug said? No grains of sand or pumice or blueberries! ? A month ago I started off thinking - reluctantly - that HP was probably just more of the light -colored stratum we rolled across above Comanche. (Is that now a hypothesis in The Waste Basket of History ?) Now I'm trying to mentally construct a microcosm of Meridiani Planitia in a polygonal....a....a petanque ground! And I can't do it. ...grinnnnnd... -------------------- My Grandpa goes to Mars every day and all I get are these lousy T-shirts!
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Feb 9 2006, 08:40 AM
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#103
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Founder Group: Chairman Posts: 14431 Joined: 8-February 04 Member No.: 1 |
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Guest_Richard Trigaux_* |
Feb 9 2006, 08:44 AM
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#104
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Guests |
Did you noticed here
http://qt.exploratorium.edu/mars/spirit/mi...55P2936M2M1.JPG the strange white zig-zag at the extreme right? It is not a cosmic ray, as it appears on two other images. It is not something shiny in the sun, as this image is in the shadow. (sometimes in this series of image it appears shiny sand grains, but not like that) |
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Feb 9 2006, 09:37 AM
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#105
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Member Group: Members Posts: 713 Joined: 30-March 05 Member No.: 223 |
QUOTE (jamescanvin @ Feb 9 2006, 04:11 AM) I haven't seen these two Pancam ESF's stitched together here yet. ... It will be in full filter colour as soon as the data is down. synthetic color versions already posted yesterday but somehow "got lost" due to the board's very high posting frequency at the moment |
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