*hich behaved as a brittle solid when 

 hcv broke. The stresses may he con- 

 iceled with earth movements and 

 Information (folding, tilting, distor- 

 tion and breaking), they can be 

 thermal stresses connected with I he 

 cooling of igneous rocks, or residual 

 .itesscs in rocks which were at one 

 time deeply buried beneath other rocks 

 ,nd later brought to the surface by 

 .rosion. Many geologists believe that 

 mist jointing is associated vsilh u re- 

 case of pressure from the '•unloading*' 

 'I overlying rocks through uplift and 

 erosion. 



In lava Hows and minor igneous 

 ntrusions such as sills, a pattern 

 I jointing that breaks the rock into 



hexagonal or pentagonal columns is 

 sometimes present. As the molten 

 material cooled, it necessarily shrank 

 and this gave rise to the regulai cracks 

 through the mass. The "Giant*s 

 Causeway*' in Northern Ireland is one 

 of the world's best-known exposures 

 of columnar jointing in basalt. In Vie- 

 lona spectacular basalt columns 

 known as the "Organ Pipes" occur in 

 the valley of Jackson's Creek, near 

 Sydenham, some 16 miles N.W. of 

 Melbourne, The columns are up to 

 70 (eel in height and are about IS 

 inches in diameter. Although they arc 

 little known to the general public. thev 

 have been visited by generations ,,t 

 Melbourne geology students and Held 



The A. E. G. (Rudd) Campbell 

 Memorial Appeal 



Approaching Wvpcitcld in \UgUSl 

 ,'J7I. for the first time since "Rudd's" 

 Icalh, I hail a niltghtS doubt in m> 

 mud that I would itnd il changed, 

 ihd il would lack Its usual dynamic 

 ■pact 



I feared "Rudd's" ftKkfol demise 

 Kltlld have K* 1 1 an unbridgeable gap 

 llv reads smile, the special bushniau 

 Hud pil humour, the ever filled 

 "Wicket of hottest peppermints, and 

 \tat wide kn'.Hvlcdjie would all he 

 Peking. 



I hail been there less than two days 

 mtn I icalised that my fens had 

 Bid unfounded Wyperleld and 

 Rudd" Campbell We« -,\n.Mi\ moils, 

 riicir long association of hall a ccn- 

 my made them eomplementarv lie 



i December, 1971 



made Wypcffcld Park — just as il 

 lielpi'd to form him, and so long as 

 the park exists "Rudd" will still be 

 there. Without realising it newcomer* 

 ta the park will see him m it. 



The memorial appeal opened |Q 

 remember "Rudil" by building a 

 viMtvts centre and museum II Ihe 

 paik snrelv jnves "s all a wonderful 

 opportunity to cotumemoiatc him by 

 conlribiiiing to it II von visit the 

 patk Ihe Rangei will he more than 

 pleased 'o ..ccepi your donation. 

 Others nius caic to gladden Mtj; 

 Campbell's heart by addressing eon- 

 tnbulions to her at Tresed, via Yaa- 

 pcet, Vic. M24. 



\ n m Jw mis 

 349 



