septarium

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Related to septarian: Septarian Nodule

sep·tar·i·um

 (sĕp-târ′ē-əm)
n. pl. sep·tar·i·a (-ē-ə)
An irregular polygonal system of calcite-filled cracks occurring in certain rock concretions.

[Latin saeptum, partition; see septum + -arium.]

sep·tar′i·an adj.

septarium

(sɛpˈtɛərɪəm)
n, pl -ia (-ɪə)
(Geological Science) a mass of mineral substance having cracks filled with another mineral, esp calcite
[C18: from New Latin, from Latin septum]
sepˈtarian adj
References in periodicals archive ?
Eight specimens, including granite, rhyolite, blueschist, septarian concretions, and a triolibite, were loaned to WMI from the geology collections at the University of Southern Indiana.
As a service (earning project, the 2011 UTM Paleobotany class conducted a "forensic reconstruction" of the collection yielding 218 specimens (172 fossil plants [168 Carboniferous; 4 Paleogene-Neogene], 29 invertebrates and ichnofossils, and 17 sedimentary-diagenetic features [Ferricrete, leisegang, septarian nodules]).
Moreover, some layers are rich in intrabasinal carbonate-rock fragments including septarian nodules, derived from the calcretes of the Agreda Fm.
And the Book Cliffs area near Grand Junction, Colorado was giving up some fine water-clear barites from its septarian nodules; a nice selection of these beauties was available.