Wednesday, March 29, 2017

Arthur Holmes - Holding Page


"Once upon a time in a galaxy .."

Mountain building - where it all began, .. with folding by crumpling the tablecloth, .. and Arthur Holmes and Li'l ol' Lulworth Cove (Dorset, England), taking on the world.  

(Holding page for the debunking.)

 Then :-
 Fig.xx.  "Once upon a time, in a galaxy."   Folded Jurassic strata.  (Arthur Holmes, Principles of Physical Geology, 1944, p.27-28).  Note the mountaineers on the summit  (waiting for the fold to grow into a mountain). [Good question :- When do folds stop folding, and start getting eroded?]
and now :-
 Fig.xx  Fast-forwarding xx light years  The type area for folding as rumpled tablecloths.   Little has changed. [Still there



 The Reasoning.
" If crustal movements were all vertical, then uplifted beds of sediment from the sea floor would generally be found lying in nearly horizontal positions. So, indeed, they often are, but in many places they have been corrugated and buckled into folds (Plate 7) in much the same' way as a tablecloth wrinkles up when it is pushed along the table. The layers of rock seen in the cliffs and on the rocky foreshores of parts of Devon and Berwickshire have been folded tightly together, like the pleats of a closed concertina. If the tablecloth is pushed along still further after a fold has appeared, the fold will gradually turn over and overlap the flat part that is being pushed along. So also in the rocks. In many an Alpine precipice great sheets of rock are visibly "overfolded" in just the same way, so that parts of them now lie upside down (see Plate 81).

"Such amazing structures as these show that certain parts of the earth's crust have yielded to horizontal compressive forces of unimaginable intensity. All the great mountain ranges of the world are carved out of rocks that have been folded and crumpled and overthrust. Long belts of the crust
have been so squeezed and thickened that they had no alternative but to rise to mountainous heights."


And by this same logic survives Plate Tectonics - though I doubt if they began with Lulworth Cove.

(to come) 

No comments:

Post a Comment