Before I get started I suggest you read Nick Hoffman's reply to similar Grondine nonsense here.

REB wrote: "Sorry, but I am still not buying the tektites theory for four reasons;

1. They are all roughly the same size. Tektites vary in size."

Ed wrote in reply: Mars's atmosphere will not vary much from location to location, and that is the key for Martian tektite formation.

Chris writes: How does this have anything to do with it? As Nick points out elsewhere the Earth's atmosphere also does not vary much from location to location and all kinds of variations in the size and shape of tektites exist here. Presumably because of the various effects an impact produces within the rock. I don't believe atmosphere or gravity are major forces in the formation of tektites.

REB wrote:"2. They are all chemically the same. Tektites vary chemically, depending on what parent material the impactor melted."

Ed wrote in reply: We have a very limited sample, and these are all from the same deposit.

Chris writes: I agree we have limited samples so far. But if you are correct then very confused readings would come from the samples. Because you are wrong about single point "sampling" if there was also "lots of impacts" they are contradictory. Unless your trying to suggest a uniformity of rock for hundreds of square miles on Mars.

REB wrote:" "3. They are all spherical, Tektites come in all shapes- spherical, teardrop, egg shape, etc. The larger they are, the less spherical they usually are."

Ed wrote in reply: While this is true for the Earth, one must remember that Mars' gravity and atmosphere differ gretly from those of planet Earth.

Chris writes: And how does the lower gravity and lower density of the Martian atmosphere control this? It would seem logical that tektites formed by impact on Mars would be larger and more deformed than on Earth.

More of Ed's reply: The sphericity is the key. There were no gas bubbles on Mars for minerals to accrete out of solution in - there has not been any volcanism on Mars for a long long time. Mars' core grew cold a long time ago.

Chris writes: A large part of the Martian bedrock is basalt (a volcanic rock) and anyone who has a clue knows basalt comes in all kinds of forms including vesicular basalt. Accretions are easily possible with water. You are not current in your knowledge of the core of Mars. Nor does when the vesicles formed matter much in geological times. I also suggest you look up concretions.

More of Ed's reply: There is no other spherical formation mechanism, other than atmospheric precipitation.

Chris writes: This is absurd on the face of it. There are as many mechanisms as Martian conditions past and present afford and you clearly don't know those conditions at all.

REB wrote:" 4. They are evenly distributed throughout the layers. Tektites are usually confined to one layer."

Ed wrote in reply: There've been a lot of impacts on Mars. The spherules are also seen elsewhere on Mars, and this is another key piece of this puzzle.

Chris writes: So if your logic is correct the Moon must have similar tektites and we sampled six different places on the Moon. Where are the Lunar Tektites?