GEOL 3032 Lecture : 3032 Week2
Document Summary
Field trip vans leave at 2:00 tuesday and. Porosity = fractional volume of pore space in unit volume. 0 1, porosity of 0. 5 means half the sediment volume is occupied by open pores. 0. 5 0. 9, or 10-50% grains by volume. Density and porosity variations in interlayered sand/mud from a deep-sea core. Porosity can be calculated in wet sediment from volume of water loss during drying, or determination of sediment bulk density. To determine porosity for a sediment sample saturated with water (like mud or sand from a core sample), determine: wet mass of sample, then dry at 100 c, And use the equation below, with a density of 2. 6-2. 75 for the grains (as appropriate): Consider a sediment layer in the seabed with porosity = 0. 85. We can say that in a unit volume of 1ml, the water volume fraction is 0. 85, and the sediment volume fraction is 0. 15.
