A LABORATORY PROTOCOL ON THE GEOLOGY EXPERIMENT CARRIED OUT BY PORTUGAL

Crustal Deformation Processes: Folding and Faulting

Students used several crustal models to predict Folding and Faulting.

4.1.2 Latvian laboratory protocol 

Karst Processes

Experimental procedure:

1.      Take a piece of paper and make a tube from it.

2.      Put the paper tube into a box.

3.      Fill the paper tube with soda (which substitutes limestone) and the box with sand.

4.      Put a piece of chalk near the paper tube.

5.      Pour vinegar on the soda in the paper tube and on the piece of chalk.

6.      Watch the formation of a sinkhole.

7.      Put the paper tube away and observe the collapse of the sand.

 Expected results:

As you see, there is the chemical dissolution of carbonate rock (soda). The surface layer can stand for a short time, but if the sand collapses (because there is no longer support from the rock), a sinkhole forms.

Limestone (a piece of chalk) does not dissolve very quickly, as it takes a lot of time.