TEXTURES Flashcards
- describes sediments’ particle sizes in epiclastic rocks
- classifies based on logarithmic phi scale using diameter
GRAIN SIZE
coarse, particle sizes from sand to gravel
CLASTS
fine, mud-sized particles
MATRIX
particle population in an attempt to represent the typical particle size in the population
CENTRAL MEASURE
bar graph that shows the weight percentage vs. phi values of clasts
HISTORGRAM
line graph that shows the weight percentage vs. phi values
FREQUENCY CURVE
line graph that shows the cumulative weight percent of all size coarser than, including phi size fraction under consideration, plotted against phi size classes
CUMULATIVE CURVE
most abundant particle size
MODE
average size of particles
MEAN
average diameter of particles
GRAPHIC GEOMETRIC MEAN
method of passing soil and sediment samples through a series of stacked mesh to determine the distribution of grain sizes
SIEVING
determines information regarding nature/maturity of a grain
GRAIN SHAPE
factors affecting grain shape
- Lithology
- Hardness
spheroid, similar dimensions in all directions
EQUANT
rod-shaped, elongated cylindrical that has an axis much longer than the other two
PROLATE
disk-shaped flattened cylindrical/disk-like where two axes are shorter than the other
OBLATE
flattened, three axes have three different lengths
BLADED
distribution of grain sizes present within sedimentary rock
GRAIN ORIENTATION
SORTING
quick method to determine phi size value for any percentile
SORTING COEFFICIENT
volume of void space in a sedimentary rock
POROSITY
arrangement of grains in a rock
PACKING DENSITY
degree of how much fluids can pass through materials
PERMEABILITY
undergone change starting from its parent material/s.
MATURITY
degree of maturity that indicates transportation history
TEXTURAL
measures amount of components present
COMPOSITIONAL
