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DOCUMENTATION_FORMAT: PLANT
SAMPLE_ID: CA01-ERCA-2
PLANT_TYPE: California chaparral perennial shrub
PLANT: Yerba santa
LATIN_NAME: Eriodictyon californicum (Hook. & Arn.) Torr.
COLLECTION_LOCALITY: Flagstaff Hill, in El Dorado county, approximately 42 km northeast of Sacramento, California
COLLECTION_LATITUDE: 38.782129 deg. N
COLLECTION_LONGITUDE: 121.083016 deg. W
DATUM: WGS-84
ORIGINAL_DONOR: Raymond F. Kokaly, USGS
SAMPLE_DESCRIPTION:
This spectrum is the average reflectance of 11 field measurements of a yerba santa plant (Eriodictyon californicum). The measurements were made at 2:30 pm local time on September 3, 2001. These spectra were made using an ASD FullRange (653) in reflectance mode, relative to a Spectralon reference panel. The bare fiber of the spectrometer was used to measure the reflectance spectra of the bushes. The tops of the leaves were dark green and waxy (with nearly white undersides). The stems were light yellow/brown in color. On average the field of view of the spectrometer included 20% green, waxy leaves, 20% yellow leaves, 20% old dry, brown leaves, 20% shadows, and 20% background soil/rock/litter. The fiber optic cable was pointed at nadir and held 30 cm above the top of the plant and moved around during the measurement. The instrument was programmed to record 6 second averages of reflectance (thus, each recorded spectrum was an average of 60 individual measurements). An average spectrum was computed from the recorded measurements and converted to absolute reflectance by multiplying by the reflectance spectrum of the Spectralon reference panel. Other samples of yerba santa was also measured, near this one, and is included in this spectral library, sample name: CA01-ERCA-1.
This spectrum was used in the following publication:
Swayze, G.A., Kokaly, R.F., Higgins, C.T., Clinkenbeard, J.P., Clark, R.N., Lowers, H.A, Sutley, and S.J., 2009,
Mapping potentially asbestos-bearing rocks using imaging spectroscopy, Geology Volume 37, pages 763-766.
http://dx.doi.org/10.1130/G30114A.1
IMAGE_OF_SAMPLE:
END_SAMPLE_DESCRIPTION.
COMPOSITIONAL_ANALYSIS_TYPE: None
COMPOSITION_DISCUSSION:
END_COMPOSITION_DISCUSSION.
TRACE_ELEMENT_ANALYSIS:
TRACE_ELEMENT_DISCUSSION:
END_TRACE_ELEMENT_DISCUSSION.
SPECTROSCOPIC_DISCUSSION:
END_SPECTROSCOPIC_DISCUSSION.
SPECTRAL_PURITY: 1a2_3_4_ # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns