Can a comet impact deposit an iridium layer? – Space/Science – HabitableZone

Space/Science

Recent posts

Recent posts

Fewer Transient Alerts coming BuckGalaxy November 2, 2026 5:48 pm (Space/Science)
This report from Congress came out last week... podrock November 1, 2026 11:22 pm (Current Events)
Happy Halloween podrock October 31, 2026 3:03 am (Off Topic)
Expect one hell of a recession/depression in 2027 Arrell October 31, 2026 1:16 am (Current Events)
Next week will get ugly.... Arrell October 30, 2026 2:02 pm (Current Events)
Sir Patrick Stewart. podrock October 30, 2026 11:52 am (Off Topic)
Bernie Taupin. A great interview podrock October 30, 2026 3:05 am (Off Topic)
A new Dwarf Planet? Arrell October 30, 2026 12:49 am (Space/Science)
John Wheeler's philosophy: "Beyond the Black Hole" RL October 17, 2025 5:00 am (Space/Science)
"Engage!" BuckGalaxy October 29, 2026 10:58 pm (Off Topic)

On this day in Space/Science

1 year ago (that week) New Glenn set for its second launch on November 9 7 replies · Nov 5, 2025
5 years ago (that week) ZEISS Mineralogic 3D 1 reply · Nov 3, 2021
10 years ago (that week) CO2 to ethanol 0 replies · Nov 1, 2016

Log in
Register

Space/Science » in reply to cognitive dissonance

Can a comet impact deposit an iridium layer?

Confused — 10/25/2003 11:26:44 AM (archived)

I thought the KT impactor was thought to be an asteroid, because of the iridium layer? I don't know if iridium is present in comets, since they're mostly ices and volatiles, right? I agree comets pose more of a threat than asteroids.

Log in or register to post.

The whole thread (50 posts)

The Moon - Raoul - 10/19/2003 12:46:31 AM
- Strategic Choices - Ken Murphy - 10/23/2003 1:18:53 PM
  - re: Strategic Choices - Mark Eby - 10/27/2003 12:20:36 AM
  - questionable analytical ability - Buster - 10/24/2003 1:18:50 AM
    - Please read carefully - Ken Murphy - 10/24/2003 1:18:22 PM
      - Repeat After Me - Buster - 10/27/2003 12:33:59 PM
      - cognitive dissonance - E.P. Grondine - 10/24/2003 5:16:13 PM
        
        The Usual Grondine Misrepresentations - Mark Eby - 10/27/2003 3:15:33 AM
        
        Can a comet impact deposit an iridium layer? - Confused - 10/25/2003 11:26:44 AM
        
        re: Can a comet impact deposit an iridium layer? - Chris Vancil - 10/26/2003 3:26:49 AM
- re: The Moon or Mars - Chris Vancil - 10/20/2003 8:38:14 AM
  - re: The Moon or Mars their changing perceptions - Raoul - 10/20/2003 9:07:43 PM
    - The Moon or Mars - Your Misconceptions - Mark Eby - 10/21/2003 2:36:32 PM
      - re: Mars - Misconceptions - Raoul - 10/21/2003 7:18:04 PM
        
        Uh - Columbus didn't have robots (n/t) - Buster - 10/21/2003 9:26:21 PM
        
        re: Exactly - Raoul - 10/22/2003 5:35:44 AM
        
        Maybe but - Buster - 10/22/2003 10:23:26 PM
    - re: The Moon or Mars their changing perceptions - Chris Vancil - 10/20/2003 11:45:31 PM
      - re: The Moon or Mars their changing perceptions - Raoul - 10/21/2003 5:43:19 AM
    - maybe you should read more about space off this board - Buster - 10/20/2003 11:16:47 PM
      - re: well - Raoul - 10/21/2003 5:49:23 AM
        
        How could you miss that Zubrin lives and breaths Martian colonization? (n/t) - Buster - 10/21/2003 9:28:14 PM
  - re: Flags and Footprints or finding the orgins of life itself? - BD - 10/20/2003 11:50:19 AM
    - re: This is a red herring: It's not an either or question. We can both look for Martian life and Explore the surface with Humans. - Chris Vancil - 10/20/2003 6:43:36 PM
      - re: Humans cannot look for life on Mars...they would contaminate the planet - BD - 10/20/2003 8:27:56 PM
        
        re:Yeah, that is your opinion...based on what exactly we do not know...it's not science or engineering for sure... - Chris Vancil - 10/20/2003 11:26:21 PM
        
        re: re:Yeah, that is your opinion...based on what exactly? Hmmm how about these from COSPAR? - BD - 10/21/2003 1:10:19 PM
        
        re: It's an engineering dialog. Knowing what only one side said is not being informed... - Chris Vancil - 10/21/2003 7:14:35 PM
        
        Reams of Data, Very Little Comprehension - Mark Eby - 10/21/2003 2:11:21 PM
        
        Gee I didn't know Apollo astronauts looked for life on the Moon - Buster - 10/20/2003 11:06:29 PM
        
        re: Gee I didn't know Apollo astronauts looked for life on the Moon.. I guess ignorance is bliss - BD - 10/21/2003 12:58:45 PM
        
        Do you always redefine a comment so you can insult it? - Buster - 10/21/2003 9:38:10 PM
- Amazing, isn't it! - Arthur Smith - 10/19/2003 3:59:17 AM
- Romanticism Is A Poor Basis For Making Major Resource Commitments - Mark Eby - 10/19/2003 2:08:20 AM
  - ... and that makes the Moon different from Mars... how? - Fox - 10/20/2003 1:22:17 AM
    - The Common Misconception - Mark Eby - 10/20/2003 3:27:10 AM
      - However - Raoul - 10/20/2003 5:38:34 AM
        
        Your Comment Is Very Misleading - Mark Eby - 10/20/2003 1:10:39 PM
        
        re: Your Comment Is Very Misleading - gbaikie - 10/20/2003 11:44:36 PM
        
        onl a moron would claim Earth is not the most valuable planet we know off - talk about your red herrings (n/t) - Buster - 10/21/2003 1:24:38 AM
        
        re: only a moron - gbaikie - 10/21/2003 8:05:54 PM
        
        You use water and carbon on Mars so you do not have to ship it from Earth - Buster - 10/21/2003 9:41:40 PM
        
        or misspell only ;-) (n/t) - Buster - 10/21/2003 1:31:56 AM
        
        Your Comment Is Very Misleading As Well - E.P. Grondine - 10/20/2003 4:11:19 PM
        
        Your ignorance is exceeded only by your arrogance - Buster - 10/20/2003 11:10:55 PM
        
        re: Ditto - Chris Vancil - 10/20/2003 7:15:44 PM
  - re: And yet - Raoul - 10/19/2003 9:59:18 AM
    - re: Fuel - SteveS - 10/19/2003 4:31:55 PM
      - re: Fuel - Raoul - 10/19/2003 6:32:43 PM
        
        re: romance of exploration - BRFelix - 10/20/2003 1:26:54 AM

HabitableZone — be civil, or at least entertaining.