authigenic

American  

[aw-thi-jen-ik] / ˌɔ θɪˈdʒɛn ɪk /

adjective

Geology.

1. (of a constituent of a rock) formed in the rock where it is found.

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authigenic British  

/ ˌɔːθɪˈdʒɛnɪk /

adjective

1. (of minerals) having crystallized in a sediment during or after deposition

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Etymology

Origin of authigenic

1885–90; < German Authigen < Greek authigenḗs native to a specific place ( aûthi there + -genēs born) + -ic; genic

Example Sentences

A recent study led by Tarhan and her colleagues, published last month in the journal Geology under the title "Authigenic clays shaped Ediacara-style exceptional fossilization," offers new insight into that process.

From Science Daily

These isotopes helped determine whether clay minerals played a role in fossilization and whether those clays came from land, known as detrital clays, or formed directly within the seafloor, known as authigenic clays.

From Science Daily

Fueled by silica-rich and iron-rich seawater and the unusual chemistry of Ediacaran oceans, these authigenic clays grew around the buried organisms.

From Science Daily

A K-Ar age of 4.21 ± 0.35 billion years represents a mixture of detrital and authigenic components and confirms the expected antiquity of rocks comprising the crater rim.

From Science Magazine

Meet Alvin, the Deep-Sea Submersible Seasickness, and Mutualistic Bacterial Mats Creepy Crawlies and Lady Gaga Heads The plan for Alvin Dive 4636 was ambitious: deploy four experiments and collect eight authigenic carbonates, four Niskin bottles of water, 24 tube cores of seep sediment, one scoop of clams, and two “slurps” of microbial mat. 

From New York Times