Interpretive geologic map of Mt. Ajo Quadrangle, Organ Pipe Cactus National Monument, Arizona

1992 ◽  
Author(s):  
Janet L. Brown
Keyword(s):  
National Monument ◽  
Geologic Map ◽  
Organ Pipe

scholarly journals Geologic map of Petroglyph National Monument and vicinity, Bernalillo County, New Mexico

2020 ◽  
Author(s):  
Ren A. Thompson ◽  
Christine F. Chan ◽  
Amy K. Gilmer ◽  
Ralph R. Shroba
Keyword(s):  
New Mexico ◽  
National Monument ◽  
Geologic Map

scholarly journals Accumulation of Silicon in Cacti Native to the United States: Characterization of Silica Bodies and Cyclic Oligosiloxanes in Stenocereus thurberi, Opuntia littoralis, Opuntia ficus-indica, and Opuntia stricta

2014 ◽  
Vol 9 (6) ◽  
pp. 1934578X1400900 ◽  
Author(s):  
Cynthia R. Wright ◽  
Emanuel A. Waddell ◽  
William N. Setzer
Keyword(s):  
United States ◽  
Essential Oils ◽  
The United States ◽  
Gas Chromatography Mass Spectrometry ◽  
Opuntia Ficus Indica ◽  
National Monument ◽  
Stenocereus Thurberi ◽  
Organ Pipe ◽  
Santa Catalina Island

Four different cactus species growing in the United States, Stenocereus thurberi growing in Organ Pipe Cactus National Monument, Arizona, Opuntia littoralis and Opuntia ficus-indica, growing on Santa Catalina Island, California, and Opuntia stricta, growing in northern Alabama, were examined for the presence of silica bodies (opaline phytoliths). Silica bodies were found in all four of these cactus species, parallelepiped-shaped crystals in S. thurberi, and starburst-shaped crystalline structures in the three Opuntia species. In addition, the essential oils of the four cactus species were obtained by hydrodistillation and analyzed by gas chromatography – mass spectrometry. To our surprise, S. thurberi, O. littoralis, and O. ficus-indica (but not O. stricta) essential oils contained cyclic oligosiloxanes. To our knowledge, cyclic oligosiloxanes have not been previously found as essential oil components.

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