In geology, a bed is a layer of sediment, sedimentary rock, or volcanic rock "bounded above and below by more or less well-defined bedding surfaces". Specifically...

Sur, Mexico Archaeological horizon Bed (geology) Geological formation Geologic map Geologic unit Lamination (geology) Law of superposition Salvador, A...

In geology, bedrock is solid rock that lies under loose material (regolith) within the crust of Earth or another terrestrial planet. Bedrock is the solid...

technique for the estimation of sediment-accumulation rates. Assise Bed (geology) Conodont biostratigraphy Erygmascope (old instrument for studying strata)...

In geology and geomorphology, a hogback or hog's back is a long, narrow ridge or a series of hills with a narrow crest and steep slopes of nearly equal...

Bedfordshire, England, abbreviated Beds Hanscom Field, an airport in Massachusetts, U.S., IATA airport code BED Bed (geology), a layer of sediment, sedimentary...

separation between grains of different sizes. Bed (geology) Foliation (geology) Liesegang rings (geology) Speleothem Stratum This definition can for example...

Geology (from Ancient Greek γῆ (gê) 'earth' and λoγία (-logía) 'study of, discourse') is a branch of natural science concerned with the Earth and other...

through faulting or other deformation of rock beds that brings distinct rock bodies into contact. The geologic subdiscipline of stratigraphy is primarily...

of relating strata to time) and geochronology (a scientific branch of geology that aims to determine the age of rocks). It is used primarily by Earth...

the early Carboniferous beds are primarily marine limestones, the Pennsylvanian was in the past treated as a full-fledged geologic period between the Mississippian...

A geologic map or geological map is a special-purpose map made to show various geological features. Rock units or geologic strata are shown by color or...

In geology, rock (or stone) is any naturally occurring solid mass or aggregate of minerals or mineraloid matter. It is categorized by the minerals included...

work The Geology of the Olduvai Gorge was published in 1976. Reck identified five main layers of deposition in the gorge, which were labelled Beds I through...

or stream bed is the bottom of a stream or river (bathymetry) and is confined within a channel, or the banks of the waterway. Usually, the bed does not...

sediment, and may be composed of geological detritus (minerals) or biological detritus (organic matter). The geological detritus originated from weathering...

In geology, a sill is a tabular sheet intrusion that has intruded between older layers of sedimentary rock, beds of volcanic lava or tuff, or along the...

A bedform is a geological feature that develops at the interface of fluid and a moveable bed, the result of bed material being moved by fluid flow. Examples...

hydrology, thermal state, accumulation, flow history, ice fabric, and bed geology. In planetary science, ice penetrating radar has also been used to explore...

A bone bed is any geological stratum or deposit that contains bones of whatever kind. Inevitably, such deposits are sedimentary in nature. Not a formal...

In geology, strike and dip is a measurement convention used to describe the plane orientation or attitude of a planar geologic feature. A feature's strike...

Thickness in geology and mining refers to the distance across a packet of rock, whether it be a facies, stratum, bed, seam, lode etc. Thickness is measured...

Flood geology (also creation geology or diluvial geology) is a pseudoscientific attempt to interpret and reconcile geological features of the Earth in...

Bulletin of the Connecticut Geology and Natural History Survey. 73. Van Houten, Franklyn B. (May 1973). "Origin of Red Beds A Review-1961-1972". Annual...

In geology, cross-bedding, also known as cross-stratification, is layering within a stratum and at an angle to the main bedding plane. The sedimentary...

silt can be carried in suspension in river water and on reaching the sea bed deposited by sedimentation; if buried, they may eventually become sandstone...

In geology, a graded bed is a bed characterized by a systematic change in grain or clast size from bottom to top of the bed. Most commonly this takes the...

The Ringstead Coral Bed (also sometimes in the plural) is a geological formation with fossilized coral in England. It preserves fossils dating back to...

In geology, a lens or lentil is a body of ore or rock that is thick in the middle and thin at the edges, resembling a convex lens in cross-section. To...

finely-bedded mudstone and mudstone arranged in rhythmic units ("cyclothems") commonly divided by thin pebble beds as described by the British Geological Survey...