root cast

root cast

[′rüt ‚kast]
(geology)
A slender, tubular, near-vertical, and commonly downward-branching sedimentary structure formed by the filling of a tubular opening left by a root. Also known as rhizoconcretion.
References in periodicals archive ?
The earliest root casts in Puerto Rico were dated Late Cretaceous (probably Santonian, 85.
In Punta Jacinto, located at Playa Jobos in Isabela, northern Puerto Rico, there is a typical example of aeolian fossilized dunes having plant root casts (rhizoliths).
At a field site near Sarnia, Ontario, root casts were observed in glacial till fractures to depths of 3.
Berner's findings may receive an additional boost when the Tennessee researchers analyze the fossil soils found with the root casts.