A change in silicic acid concentrations across the Triassic-Jurassic boundary? A look from δ30Si of sponge spicules via SIMS
Joyce Ann Yager1, A. Joshua West2, Nathaniel Stein3, Frank A Corsetti2, David J Bottjer4, William Berelson5 and Woodward W Fischer6, (1)University of Southern California, Los Angeles, United States, (2)University of Southern California, Department of Earth Sciences, Los Angeles, CA, United States, (3)University of Colorado at Boulder, Geological Sciences, Boulder, CO, United States, (4)Univ Southern California, Department of Earth Sciences, Los Angeles, United States, (5)University of Southern California, Earth Sciences, Los Angeles, United States, (6)Caltech, Division of Geological and Planetary Sciences, Pasadena, United States
