Difference in the formation of Coronae on Miranda and Coronae on Venus |
Difference in the formation of Coronae on Miranda and Coronae on Venus |
Nov 6 2006, 04:52 PM
Post
#1
|
|
Newbie Group: Members Posts: 3 Joined: 13-July 06 Member No.: 970 |
Can anyone tell besides Venus being a terrestial planet and Miranda a icy satellite, what is the real diffrnce in their formation of Coronas on both surfaces. Where they both formed the same way like an upwelling of material from within or are they called coronas because both they are similar.
I hope this is clear Thanks. |
|
|
Nov 6 2006, 05:02 PM
Post
#2
|
|
Senior Member Group: Moderator Posts: 3225 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
They are both called coronae because both types of features are shaped like ovals Seriously. The descriptor term in a feature name, be it patera, corona, or facula, are just that, descriptor terms, and may relate to different types of features on different bodies (and even features that formed in different ways on the same body). For example, some facula on Titan are formed as ejecta blankets around impact craters. Some are just hills poking up above the surrounding dark, sand dunes.
-------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
|
|
Nov 6 2006, 05:26 PM
Post
#3
|
|
Member Group: Members Posts: 509 Joined: 2-July 05 From: Calgary, Alberta Member No.: 426 |
Hmm. That's an interesting point.
I guess it's like on Earth, where the term "mountain" can refer to any major topographic high, regardless of whether it was thrust up by tectonism, spouted up by extrusive vulcanism, or gradually exposed by preferential erosion of surrounding material. |
|
|
Guest_Enceladus75_* |
Oct 23 2008, 01:59 AM
Post
#4
|
Guests |
Have scientists come any closer to answering the question as to explaining Miranda's jumbled up appearance? I mean, is the collision/re-formation idea still dominant or do they believe that there was another way (ie vie cryovolcanism/differentiation/mass tectonics)
Personally, given Miranda's tiny size, I can't see how those huge coronae were formed by cryovolcanism. |
|
|
Oct 23 2008, 04:29 AM
Post
#5
|
|
Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
No, there's now an alternative theory, that they formed by upwelling. Do a Google search on pappalardo greeley miranda. Alternatively, join the Planetary Society (with the dollar so weak, it's a great deal for international members right now) and ask to be sent a copy of the March/April 2005 issue of The Planetary Report, in which Bob Pappalardo wrote a detailed article about the current thinking on Miranda.
--Emily -------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
|
|
|
Guest_Enceladus75_* |
Oct 24 2008, 12:45 AM
Post
#6
|
Guests |
Emily, thanks a million for that. I'll take a look.
|
|
|
Lo-Fi Version | Time is now: 28th March 2024 - 01:59 PM |
RULES AND GUIDELINES Please read the Forum Rules and Guidelines before posting. IMAGE COPYRIGHT |
OPINIONS AND MODERATION Opinions expressed on UnmannedSpaceflight.com are those of the individual posters and do not necessarily reflect the opinions of UnmannedSpaceflight.com or The Planetary Society. The all-volunteer UnmannedSpaceflight.com moderation team is wholly independent of The Planetary Society. The Planetary Society has no influence over decisions made by the UnmannedSpaceflight.com moderators. |
SUPPORT THE FORUM Unmannedspaceflight.com is funded by the Planetary Society. Please consider supporting our work and many other projects by donating to the Society or becoming a member. |