Ordovician Impact Ejecta From Northern Illinois?

Ordovician Impact Ejecta From Northern Illinois?

Today, I found the rather interesting abstract. I do not
know what to make of it. It would be interesting to see
if this material might possibly be contemporaneous
with the Scandinavian fossil meteorites when I have
time. the abstract is:

Read, W. F., 1986, Fragments of Rock from a Probable
Impact Ejecta Deposit in Ordovician Sediments of Northern
Illinois. Lunar and Planetary Science. vol. XVII, pp. 693-694.
Abstract. Bibliographic Code: 1986LPI....17..693R
http://adsabs.harvard.edu/abs/1986LPI....17..693R
http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?1986LPI....17..693R&defaultprint=YES&filetype=.pdf

For an article about the Scandinavian fossil meteorites,
go see Tiny Traces of a Big Asteroid Breakup by Linda M. V.
Martel, Hawai'i Institute of Geophysics and Planetology
http://www.psrd.hawaii.edu/Mar04/fossilMeteorites.html
http://www.psrd.hawaii.edu/Mar04/PSRD-fossilMeteorites.pdf

Yours,

Paul H.