Here is the original image which I have resized including a rectangle showing the area of interest.
Ref: http://mars.nasa.gov/mer/gallery/all/1/p/2540/1P353670372EFFB1I5P2264L2M1.JPG
"All truth passes through three stages. First, it is ridiculed; Second, it is violently opposed; Third, it is accepted as being self-evident."
Arthur Schopenhauer
If you can imagine everything we know 1000x smaller you should have no problems in being able to identify what can be seen in the view below.
Note the towers and cylinder-type domes on top of some of the small shapes. The whole view is full of some very interesting object detail.
Many viewers of the above view will probably be of the opinion that the object is just a rock with a rough surface texture.
But to see what constitutes this rough-looking texture you have to look closer.
The image below is a section from the above view that I have rotated in order to examine the surface shapes from a different perspective.
Note that now the anomalous shapes are not looking so anomalous after all as some have definite geometrical form.
This sectional image was resized to 700 pixels wide.
Here is a sectional view of an image captured by Opportunity.
There are many interesting shapes showing in the view.