@article{488034b37bcb425d896b3c9d00c685ec,
title = "Late Middle Ordovician environmental change and extinction: Harbinger of the late-Ordovician or continuation of Cambrian patterns?",
author = "ME Patzkowsky and LA Slupik and MA Arthur and RD Pancost and KH Freeman",
note = "Publisher: Geological Soc. America",
year = "1997",
month = oct,
doi = "10.1130/0091-7613(1999)025<0911:LMOECA>2.3.CO;2",
language = "English",
volume = "25(10)",
pages = "911 -- 914",
journal = "Geology",
issn = "1943-2682",
publisher = "Geological Society of America",
}