Answer to the crater puzzle


jimcoble2000
 

In order, oldest to youngest

ABC

A has its circular rim broken by B, so A must predate B.

Now B and C are a bit harder.

All the craters are circular.  B's ring, though, appears to be truncated or flattened by the circular rim of C. C is quite round appearing. So B must have existed before C.

Hence ABC.

Notice also the rim of A appears to be more worn and rounded whereas the rims of B and C are sharper and less worn looking. So A is certainly the oldest by that standard. 


Matthew Cook
 

WOO HOO!  Winner, winner chicken dinner!


On Nov 11, 2020, at 20:33, jimcoble2000 via groups.io <jimcoble2000@...> wrote:

In order, oldest to youngest

ABC

A has its circular rim broken by B, so A must predate B.

Now B and C are a bit harder.

All the craters are circular.  B's ring, though, appears to be truncated or flattened by the circular rim of C. C is quite round appearing. So B must have existed before C.

Hence ABC.

Notice also the rim of A appears to be more worn and rounded whereas the rims of B and C are sharper and less worn looking. So A is certainly the oldest by that standard. 


preciousmyprecious
 

I was gonna say that

Carpe Noctem
Bill McLean


On Wednesday, November 11, 2020, 08:33:40 PM EST, jimcoble2000 via groups.io <jimcoble2000@...> wrote:


In order, oldest to youngest

ABC

A has its circular rim broken by B, so A must predate B.

Now B and C are a bit harder.

All the craters are circular.  B's ring, though, appears to be truncated or flattened by the circular rim of C. C is quite round appearing. So B must have existed before C.

Hence ABC.

Notice also the rim of A appears to be more worn and rounded whereas the rims of B and C are sharper and less worn looking. So A is certainly the oldest by that standard. 


jimcoble2000
 

Of course

On Thursday, November 12, 2020, 8:15:47 AM EST, preciousmyprecious via groups.io <preciousmyprecious@...> wrote:


I was gonna say that

Carpe Noctem
Bill McLean


On Wednesday, November 11, 2020, 08:33:40 PM EST, jimcoble2000 via groups.io <jimcoble2000@...> wrote:


In order, oldest to youngest

ABC

A has its circular rim broken by B, so A must predate B.

Now B and C are a bit harder.

All the craters are circular.  B's ring, though, appears to be truncated or flattened by the circular rim of C. C is quite round appearing. So B must have existed before C.

Hence ABC.

Notice also the rim of A appears to be more worn and rounded whereas the rims of B and C are sharper and less worn looking. So A is certainly the oldest by that standard.