General Climbing Discussion

Topic	Date	User
Grafitti on Mirage, Taipan Wall ?	25-Aug-2006 At 4:13:13 PM	tmarsh
Message
On 25/08/2006 manky_rat wrote: >Dissolving chalk by acid is a wonderful idea..... except that any acid >strong enough to dissolve the MgCO3 in the chalk is likely to dissolve >the CaCO3 in the rock that cements the grains of quartz together. Are you sure that's right? Whilst sandstone is a pretty broad description and some sandstones have a high CaCO3 content, quartzose sandstones approach nearly 100% silicates as the cementing agents. For what it's worth, my 'suggestion' of using acid to wash the chalk off was largely in jest. Don't do it, people.

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