Related Words

Phi Scale: Scale used for measuring the grain size of sediments. = -log2 (grain diameter)

Ophiolite Suite: The typical sequence of rocks in the oceanic crust from bottom to top: ultrabasic rocks, gabbro, sheeted dikes, pillow basalts, and sea-floor sediments. Igneous rocks and deep-sea sediments . . . View Full Definition

Orographic Lifting: Where the flow of air is forced up and over barriers such as highlands or mountains. Moist air being forced aloft begins to cool, consequently condensation forms, and rain or snow begins to . . . View Full Definition

Oligotrophic: Refers to water bodies or habitats with low concentrations of nutrients

Paleogeographic Map: A map that shows the distribution of sedimentary environments at a specific time in the past. These maps are made by studying the rock record to correlate rock units that were deposited at t . . . View Full Definition

Offering Scale: The range of prices offered by the underwriter of a serial bond issue with different maturities.

Mohs Hardness Scale: A collection of minerals ranging from very soft to very hard. Use as a comparison scale during mineral identification. From softest to hardest, the ten minerals are: talc 1, gypsum 2, calcit . . . View Full Definition

Mohs Scale Of Hardness: An empirical, ascending scale of mineral hardness with talc as 1, gypsum 2, calcite 3, fluorite 4, apatite 5, orthoclase 6, quartz 7, topaz 8, corundum 9, and diamond 10.

Nephilim: In ancient Hebrew tradition, the Nephilim (singular Naphil) were a race of giants referred to in Genesis 6:4 (Now giants were upon the earth in those days') and in Numbers 13:33 (We saw the . . . View Full Definition

Nongeographic Farming: Farming/prospecting a particular segment of the market such as an ethinic group or nationality, as opposed to a geographic area.