FACTOID # 30: If Alaska were its own country, it would be the 26th largest in total area, slightly larger than Iran.
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Encyclopedia > Incremental dating

Incremental dating techniques allow the construction of year-by-year annual chronologies, which can be fixed (i.e. linked to the present day and thus A calendar is a system for assigning calendar dates to days. The dates may be based on the perceived motion of astronomical objects. A calendar is also a physical device (often paper) that illustrates the system (for example, a desktop calendar). The term is also used to indicate a particular... calendar or The orbital period is the time it takes a planet (or another object) to make one full orbit. There are several kinds of orbital periods for objects around the Sun: The sidereal period is the time that it takes the object to make one full orbit around the Sun, relative... sidereal time) or floating.

Incremental dating techniques

  • Pinus taeda Cross section showing annual rings Cheraw, South Carolina Dendrochronology or tree-ring dating is the method of scientific dating based on the analysis of tree ring patterns. This technique was invented and developed during the 20th century originally by A.E. Douglass, the founder of the Laboratory of... Dendrochronology
  • An ice core is a tube of ice removed from an ice sheet. The ice is older the further down it gets, so an ice core contains ice formed over a range of years. Ice cores are collected by driving a hollow tube or by core drilling deep into the... Ice cores
  • Lichens are a symbiotic relationship between algal and fungal communities and they increase in size radially as they grow. Measuring the diameter of the largest lichen on a rock surface can thus be used to determine the time the rock has been exposed. Lichen can be preserved on old rock... Lichenometry
  • Paleomagnetism refers to the orientation of the Earths magnetic field as it is preserved in various magnetic iron bearing minerals throughout time. The study of paleomagnetism has demonstrated that the Earths magnetic field has changed over time. Paleomagnetism can be divided into two fields: Polar wandering: the magnetic... Paleomagnetic dating
  • A varve is an annual layer of sediment or sedimentary rock. The word Varve is derived from the Swedish word varv whose meanings and connotations include revolution, in layers, and circle. The term first appeared as Hvarfig lera (varved clay) on the first map produced by the Geological Survey of... Varves
  • A speleothem (from the Greek for cave deposit) is a formal term for what is also known as a cave formation, or amongst cavers, collectively known as pretties. They are the result of the interactions among water, rock, and air within caves. Formations in Hall of the Mountain Kings, Ogof... Speleothems

See also

  • Radiometric dating is a technique used to date materials based on a knowledge of the decay rates of naturally occurring isotopes, and the current abundances. Various methods exist differing in accuracy, cost and applicable time scale Types of radiometric dating radiocarbon dating rubidium-strontium samarium-neodymium potassium-argon argon-argon... Radiometric dating



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