Geologic Map of Portions of the Fort McDowell and McDowell Peak Quadrangles, Maricopa County, Arizona
KeywordsArizona Geological Survey Open File Reports
lower Verde River Valley,
Basin and Range Province
McDowell Mountain Regional Park
Fort McDowell Indian Reservation
Tonto National Forest
ancestral Verde River
Union Hills Group
MetadataShow full item record
CitationSkotnicki, S.J., 1996, Geologic Map of Portions of the Fort McDowell and McDowell Peak Quadrangles, Maricopa County, Arizona. Arizona Geological Survey Open File Report, OFR-96-11, 1 map sheet, map scale 1:24,000, 20 p.
PublisherArizona Geological Survey (Tucson, AZ)
DescriptionThis map depicts both the bedrock geology and the general ages and distribution of Late Tertiary and Quaternary deposits and geomorphic surfaces in the northern part of the lower Verde River Valley, in Maricopa County. The map area includes portions of the Fort McDowell and McDowell Peak 7.5' U.S.G.S. topographic quadrangles (Figure 1). The region studied encompasses the region between the northern end of the McDowell Mountains on the west to about one mile east of the Verde River on the east. Mapping of the surficial deposits was based both on field observations and interpretation of black-and-white, 1:48,000-scale aerial photographs (dated 12-9-90) purchased from the Arizona Department of Transportation Photogrammetry and Mapping Division.
RightsArizona Geological Survey. All rights reserved.
Collection InformationDocuments in the AZGS Document Repository collection are made available by the Arizona Geological Survey (AZGS) and the University Libraries at the University of Arizona. For more information about items in this collection, please contact firstname.lastname@example.org.
North Bounding Coordinate33.7379
South Bounding Coordinate33.6419
West Bounding Coordinate-111.838
East Bounding Coordinate-111.618
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Ginger and turmeric expressed sequence tags identify signature genes for rhizome identity and development and the biosynthesis of curcuminoids, gingerols and terpenoidsKoo, Hyun Jo; McDowell, Eric; Ma, Xiaoqiang; Greer, Kevin; Kapteyn, Jeremy; Xie, Zhengzhi; Descour, Anne; Kim, HyeRan; Yu, Yeisoo; Kudrna, David; et al. (BioMed Central, 2013)BACKGROUND:Ginger (Zingiber officinale) and turmeric (Curcuma longa) accumulate important pharmacologically active metabolites at high levels in their rhizomes. Despite their importance, relatively little is known regarding gene expression in the rhizomes of ginger and turmeric.RESULTS:In order to identify rhizome-enriched genes and genes encoding specialized metabolism enzymes and pathway regulators, we evaluated an assembled collection of expressed sequence tags (ESTs) from eight different ginger and turmeric tissues. Comparisons to publicly available sorghum rhizome ESTs revealed a total of 777 gene transcripts expressed in ginger/turmeric and sorghum rhizomes but apparently absent from other tissues. The list of rhizome-specific transcripts was enriched for genes associated with regulation of tissue growth, development, and transcription. In particular, transcripts for ethylene response factors and AUX/IAA proteins appeared to accumulate in patterns mirroring results from previous studies regarding rhizome growth responses to exogenous applications of auxin and ethylene. Thus, these genes may play important roles in defining rhizome growth and development. Additional associations were made for ginger and turmeric rhizome-enriched MADS box transcription factors, their putative rhizome-enriched homologs in sorghum, and rhizomatous QTLs in rice. Additionally, analysis of both primary and specialized metabolism genes indicates that ginger and turmeric rhizomes are primarily devoted to the utilization of leaf supplied sucrose for the production and/or storage of specialized metabolites associated with the phenylpropanoid pathway and putative type III polyketide synthase gene products. This finding reinforces earlier hypotheses predicting roles of this enzyme class in the production of curcuminoids and gingerols.CONCLUSION:A significant set of genes were found to be exclusively or preferentially expressed in the rhizome of ginger and turmeric. Specific transcription factors and other regulatory genes were found that were common to the two species and that are excellent candidates for involvement in rhizome growth, differentiation and development. Large classes of enzymes involved in specialized metabolism were also found to have apparent tissue-specific expression, suggesting that gene expression itself may play an important role in regulating metabolite production in these plants.
Temperature response surfaces for mortality risk of tree species with future droughtAdams, Henry D; Barron-Gafford, Greg A; Minor, Rebecca L; Gardea, Alfonso A; Bentley, Lisa Patrick; Law, Darin J; Breshears, David D; McDowell, Nate G; Huxman, Travis E; Univ Arizona, Dept Ecol & Evolutionary Biol; et al. (IOP PUBLISHING LTD, 2017-11-01)Widespread, high levels of tree mortality, termed forest die-off, associated with drought and rising temperatures, are disrupting forests worldwide. Drought will likely become more frequent with climate change, but even without more frequent drought, higher temperatures can exacerbate tree water stress. The temperature sensitivity of drought-induced mortality of tree species has been evaluated experimentally for only single-step changes in temperature (ambient compared to ambient + increase) rather than as a response surface (multiple levels of temperature increase), which constrains our ability to relate changes in the driver with the biological response. Here we show that time-to-mortality during drought for seedlings of two western United States tree species, Pinus edulis (Engelm.) and Pinus ponderosa (Douglas ex C. Lawson), declined in continuous proportion with increasing temperature spanning a 7.7 degrees C increase. Although P. edulis outlived P. ponderosa at all temperatures, both species had similar relative declines in time-to-mortality as temperature increased (5.2% per degrees C for P. edulis; 5.8% per. C for P. ponderosa). When combined with the non-linear frequency distribution of drought duration-many more short droughts than long droughts-these findings point to a progressive increase in mortality events with global change due to warming alone and independent of additional changes in future drought frequency distributions. As such, dire future forest recruitment patterns are projected assuming the calculated 7-9 seedling mortality events per species by 2100 under business-as-usual warming occur, congruent with additional vulnerability predicted for adult trees from stressors like pathogens and pests. Our progressive projection for increased mortality events was driven primarily by the non-linear shape of the drought duration frequency distribution, a common climate feature of drought-affected regions. These results illustrate profound benefits for reducing emissions of carbon to the atmosphere from anthropogenic sources and slowing warming as rapidly as possible to maximize forest persistence.