ratio map

ratio map

[′rā·shō ‚map]
(geology)
A facies map that depicts the ratio of thicknesses between rock types in a given stratigraphic unit.
References in periodicals archive ?
The sand to shale ratio map of Bahariya (Figure 15(a)) reveals sandy facies in the western parts and shaly facies in the eastern parts of the study area.
The sand to shale ratio maps of Bahariya and Kharita Formations are illustrated in Figures 15(a) and 5(b), respectively.
When evaluating its benefit within the context of driving cycles, for example FTP, the vehicle-level fuel economy will be highly dependent on the amount of time spent at max OD ratio, and is very sensitive to the CVT ratio map calibration.
After the spatial distribution maps of the total and available contents of a macronutrient were obtained, its availability ratio map could be further derived from the total content map and available content map by using (1) (i.e., at each spatial location, availability ratio = available content/total content).
The thorium map (eTh; ppm; Figure 3d) shows several high frequency local anomalies similar to those recognized on the uranium map, inferring the presence of geological discontinuities or local faults orientated NE-SW, NW-SE and N-S As thorium enrichment does not usually accompany potassium during hydrothermal alteration, the eTh/K ratio map provided an excellent distinction between potassium associated with alteration and anomalies related to normal lithological variations (Figure 4a).
To construct elevation-relief ratio map layers, the three input planar surface map layers outlined previously are required as these effectively constitute the terms needed to satisfy the elevation-relief ratio (Equation 1); this requires two separate stages to be undertaken.
The results of the FTIR-RTM analyses of the three PLLA-PDLLA composition gradients {visual map, total absorbance map (1500 [cm.sup.-1] to 1155 [cm.sup.-1] spectral region), ratio map [(peak at 1270 [cm.sup.-1])/(peak at 1450 [cm.sup.-1])] and 3D plot, all obtained with the acquisition software} are shown in Figs.
For each of these storms, we have created flood ratio maps by interpolating the values among the different stream gage stations using the inverse distance weighting method.
These IR/UV ratio maps provide a measure of the so-called redness of the surface, defined by enhanced absorption at shorter wavelengths.
This allows the map to represent the radioactive element distribution better than any of the other single variable or ratio maps. The ternary map is often easier to work with to get an overview of the distribution of radioactivity; however, it does not replace the more detailed, quantitative information available on the other seven maps (total or natural air absorbed dose rate, K, eU, eTh, eU/eTh, eU/K, and eTh/K).
During the 1980's and the 1990-2000 time period, blue marlin B:T ratio maps indicate either minor change or increases in fished areas of the Caribbean Sea, off Brazil, and off the southern African coast.
Dr Agnihotri also analyses the data on the basis of caste, kinship, ethnicity and geophysical regions to create sex ratio maps which provide useful insights into the regional aspects of the problem.
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