graphic log
graphic log An outline description of a particular sequence of rocks, made in the field and set out in columnar form. It is usual to sketch in each succeeding rock unit with its appropriate lithologic symbol, and draw thicknesses of units to scale. Subsequent columns contain data concerning: particle size (shaded in according to a horizontal scale); sedimentary structures; fossils; colour; palaeocurrent directions (see PALAEOCURRENT ANALYSIS); weathering; sorting; and any other salient features gathered under the general heading of ‘remarks’. See also LITHOLOGIC SYMBOL.
More From encyclopedia.com
Magnetostratigraphy , magnetostratigraphic time-scale (polarity time-scale, geomagnetic reversal time-scale, reversal time-scale) A time-scale based on the periodic polari… Arenaceous , arenaceous Sandy, or sand-like in appearance or texture. The term is applied to clastic sedimentary rocks with a grain size of 0.0625–2.00 mm. Three… Scale , scale1 / skāl/ • n. 1. each of the small, thin horny or bony plates protecting the skin of fish and reptiles, typically overlapping one another. 2. s… Igneous Rocks , Igneous rocks are formed by the cooling and hardening of molten magma. The word igneous comes from the Latin word igneus, meaning fire, and there are… Iron Ores , Rocks
Rocks are composed of minerals, which are natural inorganic (nonliving) substances with specific chemical compositions and structures. A rock m… Mercalli Scale , Mercalli scale An earthquake-intensity scale based on direct observation. Devised by G.Mercalli, it ranges from scales I (not felt) and II (felt by m…
You Might Also Like
NEARBY TERMS
graphic log