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Before Present

Before Present (BP) or "years before present (YBP)" is a time scale used mainly in archaeology, geology, and other scientific disciplines to specify when events occurred relative to the origin of practical radiocarbon dating in the 1950s. Because the "present" time changes, standard practice is to use 1 January 1950 as the commencement date (epoch) of…

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Overview

Usage

Radiocarbon dating

Radiocarbon calibration

Conversion

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  • ISBN ISBN (identifier)

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Before Present

Nodes36
Edges35
Triples9
Avg. degree1.94
Density0.055556
Components1

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Before Present

Top relations

related to Conversion · 6
Before Present → AD, BC, BP, Conversion, For, Gregorian

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Important terminology

radiocarbon bp dating years dates time 1950 present use year scale ad used standard carbon epoch using origin also uncalibrated

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
confidence levelsinstance ofand other information0.80text
because of differences between the methods used by different laboratoriesinstance ofand other information0.80text
changes in calibrating methodsinstance ofand other information0.80text
Before Presentrelated to ConversionConversion0.60section
Before Presentrelated to ConversionGregorian0.60section
Before Presentrelated to ConversionBP0.60section
Before Presentrelated to ConversionFor0.60section
Before Presentrelated to ConversionAD0.60section
Before Presentrelated to ConversionBC0.60section

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