REE, Th, and Sc evidence for the depositional setting and source rock characteristics of the Quartz Hill chert, Sierra Nevada, California

Author(s):  
Gary H. Girty ◽  
Robin W. Barber ◽  
Charles Knaack
1994 ◽  
Vol 34 (1) ◽  
pp. 787
Author(s):  
R. Alexander ◽  
T.J. Currie ◽  
R.I. Kagi

A total of 83 samples of stranded bitumens collected from the western and southern coasts of Western Australia have been classified into eight groups on the basis of their biomarker compositions. The source rock characteristics inferred for these bitumens, in terms of organic matter type and depositional setting indicated by the biomarkers, suggest strongly that the bitumens originate from a variety of areas in SE Asia in the vicinity of the Indonesian archipelago. In fact, in seven of the eight cases a good correlation is observed between biomarker composition of each bitumen group and a produced crude oil or oil seep from this region. The bitumens are transported to and around the Australian coastline by a system of ocean currents.


1994 ◽  
Vol 22 (3-5) ◽  
pp. 521-IN6 ◽  
Author(s):  
Andrew P. Murray ◽  
Roger E. Summons ◽  
Christopher J. Boreham ◽  
Lesley M. Dowling

Author(s):  
Elizabeth Cortés Castillo ◽  
Julián Andrés López Isaza
Keyword(s):  

Author(s):  
Ernesto Hernández-Romero ◽  
Reyna Rojano-Hernández ◽  
Ricardo Mendoza-Robles ◽  
José. I. Cortés- Flores ◽  
Antonio N. Turrent-Fernández

En la Sierra Nevada de Puebla, México, los huertos de durazno (Prunus persica L.) presentan problemas de producción relacionados con alta incidencia de plagas (incluye enfermedades), nutrición deficiente e inadecuado manejo de poda, que acentúan el problema de floración precoz en la mayoría de las variedades mejoradas.


Sign in / Sign up

Export Citation Format

Share Document