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These were then used to shape the matrixes from which the records were pressed.
The metaconglomerates comprise monocrystalline or polycrystalline angular or subrounded clasts of quartz embedded in an arenaceous matrix.
Equivalently, physicists can represent a given quantum system by a matrix - a square array of whole numbers.
Locally, intense brecciation gave rise to angular vein quartz fragments enveloped by a matrix of massive hematitic rock.
He discovered the rule for multiplying matrices in 1812 and it is almost certainly for this that he will be remembered rather than his other work.
Both the matrix and crystals are generally rather highly fractured, making it difficult to collect good unbroken specimens.
The larger dolomite crystals fill voids in the fine-grained dolomite matrix.
Two images can be captured, one where the matrix is in focus, the other where the crystals are in focus.
We tipped the matrix of quartz on microcline and cleavelandite to remove the crystal, no easy job in the confined space of the pocket.
The fine-grained matrix consists chiefly of gypsum, although traces of anhydrite may be present.
These blocks are enclosed in a matrix of sheared, serpentinized ultramafic rocks and thus the entire sequence constitutes another melange.
The matrix is inserted at its base, the mould is adjusted to the desired width, molten lead is poured in to form a column, and the character is cast in the matrix at the bottom.
Except for a few small bone fragments, no fossils have been observed within the clasts or in the matrix.
Crystals free from the matrix are virtually nonexistent.
Rhombs of ferroan dolomite occur both in the fringe around the fossils and within the matrix of the concretion.
However he also worked on differential equations, matrices and other topics in algebra, continued fractions, geometry and number theory.
Of particular importance is his appreciation of the value of elementary hermitian matrices in numerical analysis.
To his surprise, fossils within the matrix were also silicified.
One consisted of specimens with cubic crystals on matrix purportedly from Siberia.
For this simple example, this means we can get to any of the six permutation matrices in a single swap.
It is also the source of many baby-pink rhodochrosite crystal groups without much matrix.
The surrounding matrix of the fossil, which creates a natural mold, should also be thoroughly examined.
Most of the crystals were standing on the quartz matrix, but a number were lying flat and were doubly terminated.
Protruding from the frozen earth, like dinosaur fossils in a matrix of rock, was a row of brown vertebrae, ancient and massive.
The fine-grained matrix consists mainly of quartz and feldspar.
In one specimen stephanite was intimately associated with pyrite in a matrix of tabular calcite crystals, all on quartz.
Limited dolomitization of the calcite around the edges of the fossils and in the matrix of the concretion occurred at a later stage.