Isolation, Purity Analysis and Stability of Hyperforin as a Standard Material from Hypericum perforatum L von ORTH, H. C. J., RENTEL, C., SCHMIDT, P. C.

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Disruption of the terrestrial plant ecosystem at the Cretaceous-Tertiary boundary, western interior von Tschudy, R.H, Pillmore, C.L, Orth, C.J, Gilmore, J.S, Knight, J.D

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A unique geochemical record at the Permian/Triassic boundary von HOLSER, W. T, SCHÖNLAUB, H.-P, MAURITSCH, H, PAK, E, SCHRAMM, J.-M, STATTAGGER, K, SCHMÖLLER, R, ATTREP, M. JR, BOECKELMANN, K, KLEIN, P, MAGARITZ, M, ORTH, C. J, FENNINGER, A, JENNY, C, KRALIK, M

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The great latest Ordovician extinction on the South China Plate: Chemostratigraphic studies of the Ordovician-Silurian boundary interval on the Yangtze platform von Wang, Kun, Orth, Charles J., Attrep, Moses, Chatterton, Brian D.E., Wang, Xiaofeng, Li, Ji-jin

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High-resolution leaf-fossil record spanning the Cretaceous/Tertiary boundary von Johnson, Kirk R., Nichols, Douglas J., Attrep, Moses, Orth, Charles J.

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Palynological and Iridium Anomalies at Cretaceous-Tertiary Boundary, South-Central Saskatchewan von Nichols, D. J., Jarzen, D. M., Orth, C. J., Oliver, P. Q.

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Geologic Framework of Nonmarine Cretaceous-Tertiary Boundary Sites, Raton Basin, New Mexico and Colorado von Pillmore, C. L., Tschudy, R. H., Orth, C. J., Gilmore, J. S., Knight, J. D.

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Conodont Survival and Low Iridium Abundances across the Permian-Triassic Boundary in South China von Clark, David L., Cheng-yuan, Wang, Orth, Charles J., Gilmore, James S.

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Global fire at the Cretaceous-Tertiary boundary von Wolbach, Wendy S., Gilmour, Iain, Anders, Edward, Orth, Charles J., Brooks, Robert R.

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Elemental abundance anomalies in the late Cenomanian extinction interval: a search for the source(s) von Orth, Charles J., Attrep, Moses, Quintana, Leonard R., Elder, William P., Kauffman, Erle G., Diner, Richard, Villamil, Tomas

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No geochemical evidence for an asteroidal impact at late Devonian mass extinction horizon von McGhee, George R., Gilmore, J. S., Orth, C. J., Olsen, Edward

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Iridium abundance maxima in the Upper Cenomanian extinction interval von Orth, C. J., Attrep Jr, M., Mao, X. Y., Kauffman, E. G., Diner, R., Elder, W. P.

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Trace element patterns at a non-marine Cretaceous–Tertiary boundary von Gilmore, J. S., Knight, J. D., Orth, C. J., Pillmore, C. L., Tschudy, R. H.

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Iridium Anomaly in the Upper Devonian of the Canning Basin, Western Australia von Playford, Phillip E., McLaren, Digby J., Orth, Charles J., Gilmore, James S., Goodfellow, Wayne D.

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A new Cretaceous-Tertiary boundary locality in the western powder River basin, Wyoming: biological and geological implications von Nichols, Douglas J., Brown, Janet L., Attrep, Moses, Orth, Charles J.

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An Iridium Abundance Anomaly at the Palynological Cretaceous-Tertiary Boundary in Northern New Mexico von Orth, Charles J., Gilmore, James S., Knight, Jere D., Pillmore, Charles L., Tschudy, Robert H., Fassett, James E.

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Trace element signatures in Dictyonema Shales and their geochemical and stratigraphic significance von BERRY, W. B. N, WILDE, P, QUINBY-HUNT, M. S, ORTH, C. J

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Iridium Abundances across the Ordovician-Silurian Stratotype von Wilde, Pat, William B. N. Berry, Quinby-Hunt, Mary S., Orth, Charles J., Quintana, Leonard R., Gilmore, James S.

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Pion-induced spallation of copper across the (3,3) resonance von Orth, C. J., Dropesky, B. J., Williams, R. A., Giesler, G. C., Hudis, J.

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LATE EOCENE IMPACT MICROSPHERULES: STRATIGRAPHY, AGE AND GEOCHEMISTRY von Keller, G., D'Hondt, S.L., Orth, C.J., Gilmore, J.S., Oliver, P.Q., Shoemaker, E.M., Molina, E.

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