[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

Re: feathered ornithopods?



With these as indicators, how could it not have gotten frosty?

Dann Pigdon wrote:

> Lets look at the evidence:
>
> - Cryoturbational geological structures, associated with both permafrost
> and "hummocking". Mean annual temperature (MAT) estimated at between -6°
> and 3° celsius based on these.
> - Iceberg/glacial dropstones in the ocean that covered much of the state
> of South Australia.
> - O-18 isotope studies suggesting an MAT of -2° +/- 5° celsius.
> - The Koonwarra insect community suggesting a similar make up to that of
> modern alpine insect communities.