If you are snowed under at this stage and doing Higher Level then I suggest you focus almost completely on the Option (GEOCOLOGY) - This is the key to improving your mark.
The types of questions that have come up are dealt with on the Geocology page - they are fairly predictable as we discussed in class
Ordinary level students remember you do not do this question - Focus on Regional and Physical.
Best of luck to you all - Make sure you get the timing right and do not leave out any part of any question!