petagram
(computing) A simple data format that can be embedded in a webpage.
(geology) The thermal boundary layer between the surface of the Earth (cooled by conduction) and the asthenosphere (cooled by convection).
A unit of mass equal to 1,000,000,000,000,000 (10¹⁵) grams. Symbol: Pg / Sometimes used in Carbon Dioxide numbers, it is equivalent to Metric Gigatons (Giga) 10⁹ x (Ton) 10³ x (kg) 10³ = 10¹⁵
(mineralogy) A particular mineral.
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