[X] My Assistant

[Quintessence]

Hi I'm a new poster, and I have some questions I was wondering if someone could help me with.

1. Has anymore dome volcanoes besides Ganesa Macula been discovered? I'm guessing that there can not be just one domed volcano on the moon.

2. Have any other volcanic calderas been discovered and have they named them yet for identifaction purposes.

3. Has the the 300 mile bright Red Spot on Xanadu been identified as a hotspot. I know that they were suppose to be testing if it was a hot spot when Cassini flew over on July 2, 2006.

Thank you very much for your time

[tty]

Pebbly alluvial deposits are quite common on Earth, for example in braided river deposits. Actually the pebbly deposit at the Huygens landing point looks liquid-deposited to me.

tty

[Guest_Richard Trigaux_*]

Pebbly alluvial deposits are quite common on Earth, for example in braided river deposits. Actually the pebbly deposit at the Huygens landing point looks liquid-deposited to me.

tty

The Huygens landing point don't seem to be a river bed.

On Earth, there are flood plains covered with pebbles, you can see one at Google Earth 31°35'N 2°11'W eye altitude 8kms (24000 feets. Yes there is an option in Google Earth to have metrics. Menu Tools>options>Wiew, hurry up the old timer brits! ). This place is covered with dark blocks (probably sandstone) from the mountains at right, ranging about 10cm to 20cm in size. They were removed to make the two tracks (a bit like in Nazca) letting see a clearer ground. I think that only a very violent rain event could flood this place with enough water to move 20cm blocks over distances of kilometres, not only into a small river bed, but all over a 30-50kms wide flood plain! On this example, this is because there is a tall mountain just nearby, and a bit of a slope (the little oasis at the foot of the mountains, where the two tracks join, is at 5kms and 100m higher than the wadi at the left, that makes a 2% slope)

But the Huygens site is not at the foot of a tall mountain, at best hills of 10-20m high (not visible in the camera field, but seen during descent) That makes much less than a 2% slope....

I too think that the most likely hypothesis is still that these pebbles were transported by a liquid flood, but there is some parameter which was very different of Earth's. The difference of density may explain that such large pebbles can be found in a flood plain so far from any tall mountain. And they were transported, perhaps million years ago, at the occasion of a very violent rain. More recent rains may have washed the dark tar which falls from the sky.