Impossible to accurately judge scale but for the apparent granularity of the surrounding surface it is possibly the size of a grapefruit.

The few Meteorites, on Earth, that I have seen don't have the same perforated structure that this does. But some forms of solidified lava do.

Given the differences between Earth's and Mar's atmospheric depth and density there may be an explanation for the difference in appearance. But surely an object of its apparent size would have created quite an impact crater, which this does not seem to be in the bottom of.

What's with the "parking-lot like landscape" description. Field of sanddunes is surely more apt. Unless it's in a Saudi CBD after a sand storm.

As for the scatalogical reference, to be consistant, it would be bovine.