That large mound of bits and pieces of earth held together by adhesive can only be the result of design. If you need the rationale I will attempt to give it tomorrow am. Thanks for your patience.
Cordially,
Test object 1. Diamond's answer in post 7.
Test object 2. Diamond's answer in post 33 and 62.
Test object 3. Answer at post 111 and 124.
Test object 4. Answer at 166 and 174.
Test object 5. Answer at 181.
Test object 6. Answer at 257.
Sorry to intrude (and I understand you have been sidetracked of late, Diamond), but I was interested in the explanation behind the conclusion. Or did I just miss it?