[Hunble]

Oh, perhaps you have confused what I have been saying all along.

Of course all of these rocks and soils are volcanic in origin. The only other alternative would be biological in origin, such as calcium deposits. Now that would get my attention!

Nobody has suggested that the "White Cliffs of Dover" have been discoverd on Mars.

My only argument, is when Earth examples are used which are only found in very close proximity to a volcano. Examples used to explain formations on Mars which are well over 500 miles away from this rover location.

That is like offering the hypothisis that rock layers found in England were formed by volcanoes located in North America. Possible, but there may be a much simpler explanation. Like a meteorite crater only 1 km away?

[pickemuphere]

Dover Beach by Matthew Arnold

The sea is calm to-night.
The tide is full, the moon lies fair
Upon the straits; -on the French coast the light
Gleams and is gone; the cliffs of England stand,
Glimmering and vast, out in the tranquil bay.
Come to the window, sweet is the night air!
Only, from the long line of spray
Where the sea meets the moon-blanch'd land,
Listen! you hear the grating roar
Of pebbles which the waves draw back, and fling,
At their return, up the high strand,
Begin, and cease, and then again begin,
With tremulous cadence slow, and bring
The eternal note of sadness in.

Sophocles long ago
Heard it on the Aegean, and it brought
Into his mind the turbid ebb and flow
Of human misery; we
Find also in the sound a thought,
Hearing it by this distant northern sea.

The Sea of Faith
Was once, too, at the full, and round earth's shore
Lay like the folds of a bright girdle furl'd.
But now I only hear
Its melancholy, long, withdrawing roar,
Retreating, to the breath
Of the night-wind, down the vast edges drear
And naked shingles of the world.

Ah, love, let us be true
To one another! for the world, which seems
To lie before us like a land of dreams,
So various, so beautiful, so new,
Hath really neither joy, nor love, nor light,

Nor certitude, nor peace, nor help for pain;
And we are here as on a darkling plain
Swept with confused alarms of struggle and flight,
Where ignorant armies clash by night.