Till

Till or glacial till is unsorted glacial sediment.

Till is derived from the erosion and entrainment of material by the moving ice of a glacier. It is deposited some distance down-ice to form terminal, lateral, medial and ground moraines.

Till is classified into primary deposits, laid down directly by glaciers, and secondary deposits, reworked by fluvial transport and other processes.

Processes

Glacial drift is the coarsely graded and extremely heterogeneous sediment of a glacier; till is the part of glacial drift deposited directly by the glacier. Its content may vary from clays to mixtures of clay, sand, gravel, and boulders. This material is mostly derived from the subglacial erosion and entrainment by the moving ice of the glaciers of previously available unconsolidated sediments. Bedrock can also be eroded through the action of glacial plucking and abrasion and the resulting clasts of various sizes will be incorporated to the glacier's bed.

Eventually, the sedimentary assemblage forming this bed will be abandoned some distance down-ice from its various sources. This is the process of glacial till deposition. When this deposition occurs at the base of the moving ice of a glacier, the sediment is called lodgement till. Rarely, eroded unconsolidated sediments can be preserved in the till along with their original sedimentary structures. More commonly, these sediments lose their original structure through the mixture processes associated with subglacial transport and they solely contribute to form the more or less uniform matrix of the till.

Tillé

Tillé is a commune in the Oise department in northern France.

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Ö till ö

ÖTILLÖ (Swedish for "Island to island") is a one-day swimrun race in the archipelago of Stockholm, Sweden. You compete in teams of two. The aim of the race is to get from Sandhamn to Utö, via 24 islands, by running across them and swimming between them. The total distance is 75 kilometres of which 10 km are open-water swimming and 65 km are trail-running. The first race was produced in 2006. The largest islands to run across are Runmarö, Nämdö and Ornö. In 2012 ÖTILLÖ was ranked as one of the toughest endurance challenges of the world by CNN.com. ÖTILLÖ is the first race and the origin to the growing movement of Swimrun. ÖTILLÖ is considered to be the World Championship of Swimrun even though it is not part of a federation.

ÖTILLÖ is produced by Michael Lemmel & Mats Skott (pre-marriage Andersson), former World Class Adventure Racers.

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Hear!

Hear! is an album by Trixter released in 1992, reaching #109 on the Billboard 200.

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Credits

Trixter

Additional musicians

Hearing

Hearing, auditory perception, or audition is the ability to perceive sound by detecting vibrations, changes in the pressure of the surrounding medium through time, through an organ such as the ear. Sound may be heard through solid, liquid, or gaseous matter. It is one of the traditional five senses; partial or total inability to hear is called hearing loss.

In humans and other vertebrates, hearing is performed primarily by the auditory system: mechanical waves, known as vibrations are detected by the ear and transduced into nerve impulses that are perceived by the brain (primarily in the temporal lobe). Like touch, audition requires sensitivity to the movement of molecules in the world outside the organism. Both hearing and touch are types of mechanosensation.

Hearing mechanism

There are three main components of the human ear: the outer ear, the middle ear, and the inner ear.

Outer ear

The outer ear includes the pinna, the visible part of the ear, as well as the ear canal which terminates at the eardrum, also called the tympanic membrane. The pinna serves to focus sound waves through the ear canal toward the eardrum. Because of the asymmetrical character of the outer ear of most mammals, sound is filtered differently on its way into the ear depending on what vertical location it is coming from. This gives these animals the ability to localize sound vertically. The eardrum is an airtight membrane, and when sound waves arrive there, they cause it to vibrate following the waveform of the sound.

Hear (disambiguation)

To hear is to detect sound.

Hear or HEAR may also refer to:

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