~0 



therefore, (hat the jointed structure of rock* will be found to h* much more connected 

 wilh the directions in which igneous rocks have swelled up and been injected, and islands, 

 mountains and continents bceft coiuceiiicntly upraised , than wilh the magnetic meridians. 

 If due to mere tension f it may have originated under both or one of Iwo influences. If 

 wc conceive, what is most reasonable and consilient with observation , ihat. Elm forinntion 

 of mountain chains h aecompliihed by a slow movement or Focccssiou of mottraenEs prolong- 

 ed during a {jrcut geological period , then we must admit that the upper layers of the 

 gradually a&cemJinj; and eoolin;; mm have "been eipo&ed to continued or repeal presort 

 from below , which, of itself f would cause the partially hardened or vbeld crust to cranky 

 or would qiti* riie to plane? of inferiour resistance to tension in which the mass would bare 

 a tendency to part. But there is another source of tension which may co-operate with exter- 

 nal pressure f or exist independently uT it , and that is simple contraction after cry sta Liga- 

 tion on cooling. 



tn and near Svngapor* wp find ihc stratified rocks in general elevated info lew rauf*cg of 

 hillocks f of which the aies coincide wilh that of the Malay Peninsula and Ihc LsLmtLj 

 from Sing&p&nt to Baitca. The si rain hare commonly hern tilled up at very high angle*, 

 frequently approaching vertical. Considering the Pvninmla aod it? prolongation in the 

 Archipelagoes south of Johoro □ * one hand which has been subjected to dors Cory pT u ionic 

 laws [\] , the- Jiral cilemal uITucl uf these Forces mo&t hare been to Ciiliflt a great IciUtOIX 

 from NE, to SW* » nerosi Ihe wiic, followed by a rend hi g ami displacement of the 

 superincumbent strain, and injection of igniftuous matter nionp lines it right angle* to 

 (hat of tension, or from WW. to SF„ The principal divisional plane* must have been 

 the result not of a transverse tension like the GrAt, but of a subsequent longitudinal 

 ane (-)■ 



The great rending and displacement of the strata t and the circum stance of the heads of 

 adjoining strata being sometimes broken up and" intermingled!, prove that mechanical 

 movement or fjreal violence, and combining a horizontal vibratory wilh a vertical 

 action , must have attended their upheaval, The direction of the*e movements must have 

 screed with the line of tension p because they were nothing more limn ihe effect of the 

 tension reaching the limit which the roc Its subject to it could hear. The strata ire generally 

 inclined from S\V. to NE. , although there are several exceptions. The elcvalory force 

 therefore acted, to a certain extent, in this direction. Was them an actual propulsion of the 

 fluid or viscid matter from SW. to HE. or merely an undulating molion in this direction? 

 Such a motion is even now experienced in. □ slight degree along the western border at least 

 of llie Peninxulu when the subterranean forces are acting hcncalH ihe western border of Su- 



TsJcftDid btJIl iIodjj Lti«£r bun «nd tit Ihe vouEft of lh« Peninimta * or the lallrr *er* Juo h> n Ittt.r *uWi&\*rj 



iin<a Ibf tut afreortPttt in ttiretlloQ i% vl»r. 

 {81 Sffl Hr, Hsrill 1 ! i»*p"t. R§**ereh*t in PAymcat t>'*oto$y 



