Olsen, P E <br/><br/>
Ascent of dinosaurs linked to an iridium anomaly at the Triassic-Jurassic boundary.  [electronic resource] 

 -  Science (New York, N.Y.)  May 2002 
 - 1305-7 p.  digital 
<br/><br/> Publication Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. 
<br/><br/><label>ISSN: </label>1095-9203 
<br/><br/><label>Standard No.: </label>10.1126/science.1065522  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Animals<br/>Biological Evolution<br/>Dinosaurs<br/>Ecosystem<br/>Ferns<br/>Fossils<br/>Geologic Sediments--chemistry<br/>Iridium--analysis<br/>Meteoroids<br/>Minor Planets<br/>North America<br/>Spores<br/>Time