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Nodular
- Nodular is used to describe a sediment or sedimentary rock composed of scattered to loosely packed nodules in matrix of like or unlike character.
en.wikipedia.org/wiki/Nodule_(geology)
In geology and particularly in sedimentology, a nodule is a small, irregularly rounded knot, mass, or lump of a mineral or mineral aggregate that typically has a contrasting composition from the enclosing sediment or sedimentary rock.
Oct 15, 2018 · Geodes and nodules are two similar but slightly different kinds of rocks. A geode is hollow inside, whereas a nodule rock is solid. Both may contain various substances inside their centers, including crystals, metals or even petroleum. Geodes and nodules can be cut open to reveal their nature.
nodule, rounded mineral concretion that is distinct from, and may be separated from, the formation in which it occurs. Nodules commonly are elongate with a knobby irregular surface; they usually are oriented parallel to the bedding.
- The Editors of Encyclopaedia Britannica
- Septarian Nodules
- What Are Septarian Nodules?
- How Are Septarian Nodules formed?
- Where Can I Find Septarians?
Septarian nodules are an interesting find, whether you bought them or found them in the wild. There’s a lot more to them than meets the eye, however, especially for the rockhound interested in the natural formation of these fascinating stones. So, let’s dig in and discuss the ins and outs of these contrasting nodules in our ultimate guide to septar...
Septarian nodules are a type of concretion where mudstone of some kind is interspersed with calcite or another carbonate-rich mineral. The calcite portions follow the pattern of radiating cracks, which occur during the unique creation of these formations. Septarian nodules consist of at least two minerals in every case. Often the larger portion is ...
The formation of Septarian Nodules is associated with the Cretaceous period. During this time, around 50 to 70 million years ago, these nodules formed in sedimentary environments as mud balls that eventually cracked and were filled with minerals, creating their unique appearance. Septarian nodules are the subject of a lot of debate, or rather their...
Septarian nodules occur in a few places. Much of the material commonly seen actually comes from the mineral-rich island of Madagascar. These are generally filled with calcite and a thin layer of aragonite, which is the darker layer between the orange/yellow center and the exterior matrix of mudstone or shale. The most famous septarian nodules come ...
Jan 24, 2022 · There are three main types of growths that you may see on your trees, some of which may require help from a professional from Arb Tech in Kansas City to diagnose and treat. An unusual lump on your tree may be a gall.
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The root nodules contain a heme pigment called leghaemoglobin, which facilitates the diffusion of oxygen. Nodule formation is autoregulated by leaf tissues. Plants have evolved defense mechanisms to check the infection.
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Concretions are compact, often rounded, accumulations of mineral matter that form inside sedimentary rocks such as shale and sandstone or in soil.
