It looks like a rock to me. What you did is decided you wanted it to be a turtle, so you selectively picked out the features of the weathered rock that supported what you wanted it to be. This is just like laying in the grass and looking at clouds. You can pick any cloud and it can look like many different things, to many different people... it just depends on what features of the cloud each person wants to favor. So its just a rock and you have an imagination.
To show you what I mean, I decided I wanted your "turtle" to be a tree with a pond behind it and grass in the foreground. I still only highlighted the weathered features and cracks of the rock without making things up. I also thought outside the box, so your "turtle" is as much a "turtle" as it is a tree, growing in a field with a pond behind it. I could pick any other set of features on this rock and use my imagination to make it anything I want it to be just by highlighting the things that support what I want. Just like laying in the grass and looking at clouds.
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