1. potassium-argon dating

noun. Geological dating that relies on the proportions of radioactive potassium in a rock sample and its decay product, argon.
Synonyms
geological dating dating
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2. potassium

noun. (pəˈtæsiːəm) A light soft silver-white metallic element of the alkali metal group; oxidizes rapidly in air and reacts violently with water; is abundant in nature in combined forms occurring in sea water and in carnallite and kainite and sylvite.
Synonyms
saltwater carnallite metal sylvine seawater kainite langbeinite brine sylvite metallic element atomic number 19 K
Antonyms
fresh water nonmetallic

3. dating

noun. (ˈdeɪtɪŋ) Use of chemical analysis to estimate the age of geological specimens.
Synonyms
rubidium-strontium dating qualitative analysis carbon-14 dating carbon dating geological dating potassium-argon dating radiocarbon dating chemical analysis

4. argon

noun. (ˈɑːrˌgɑːn) A colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere.
Synonyms
atomic number 18 chemical element Ar argonon air inert gas element noble gas
Antonyms
wet software curve
Etymology
argon (English)
ἀργόν (Ancient Greek (to 1453))
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