Underneath the camp, and on all the hills where her riches are stored, the soil is found to be a porphyritic overflow overlying a highly silicified dolomite, that goes by the common name of 'limestone.
It is an interesting fact that the silicified wood of the Irawadi should have attracted attention more than one hundred years ago.
Hooke explained with considerable clearness the different modes wherein organic substances may become lapidified; and, among other illustrations, he mentions some silicified palm-wood brought from Africa, on which M.
Such other points in Styria appear likewise to be of the same epoch, as well as many localities in Hungary so rich in silicified wood.
The siliceous sandstone is very uniform in its character; and in Nubia, as in Egypt, the only organic bodies which it has as yet been found to contain, are silicified stems of wood.
Eleven of these trees were silicified and well preserved; Mr. R.
In this case, we may conclude that the land whence the pebbles were derived, and on which the now silicified trees once flourished, was formed of granite.
Much silicified wood is found on the banks of the Parana (and likewise on the Uruguay), and I was informed that they come out of these lower beds; four specimens collected by myself are dicotyledonous.
Numerous facts, as in the case of geodes, and of cavities in silicified wood, in primary rocks, and in veins, show that crystallisation is much favoured by space.
The greater part is honeycombed with irregular, angular, cavities, so that the whole has a curious appearance, and some fragments resemble in a remarkable manner silicified logs of decayed wood.
A silicified stem of tree fern, found in abundance in the Triassic sandstone.
Besides the upright stumps above mentioned, the dirt-bed contains the stems of silicified trees laid prostrate.
When I visited Aix, I found the silicified wood of this plant very plentifully dispersed through the white sands in the pits near that city.
Every geologist is aware how often silicified trees occur in volcanic tuffs, the perfect preservation of their internal structure showing that they have not decayed before the petrifying material was supplied.
Many silicifiedtrunks of coniferous trees, and the remains of plants allied to Zamia and Cycas, are buried in this dirt-bed, and must have become fossil on the spots where they grew.
Among the remarkable fossils of the Rothliegendes, or lowest part of the Permian in Saxony and Bohemia, are the silicified trunks of tree-ferns called generically Psaronius.
Besides red and green shales and red sandstones, it comprises much soft white quartzose sandstone, in which the trunks of silicified trees have been met with at Allesley Hill, near Coventry.
These plains are much higher than the sandstone ravines, and the soil contains not only pebbles, but angular fragments of the knots and fibres of wood in a silicified state, and much encrusted with chalcedony.
Fine-grained sandstone, with impressions of leaves, was again observed, and a few pieces of silicified wood.
Pieces of silicified wood were frequent in the bed of the Isaacs.
The greatest abundance, however, of Jurassic Radiolaria has been yielded by the silicified coprolites from the Lias of Hanover.
The single siliceous spicules, which are irregularly interwoven to form the spongy web, are to be regarded as the silicified threads of the intracalymmar sarcode network.
Next to the coprolites the richest is the red jasper, whose colour varies from bright to dark red; it constitutes a true "silicified deep-sea Radiolarian ooze.
Defn: Combined or impregnated with silicon or silica, especially the latter; as, silicified wood.
Defn: A silicified stem of tree fern, found in abundance in the Triassic sandstone.
Georgia, Alabama and Florida, with account of fossils in, silicified from thermal springs, C.
Great prostrate silicifiedtrunks of trees, embedded in a conglomerate, were extraordinarily numerous.
From this resemblance I expected to find silicified wood, which is generally characteristic of those formations.
Here there are vast numbers of water-rolled logs of silicified wood, in rocks of Triassic age, but only a small quantity of the wood is fine enough for ornamental purposes.
The probability of the occurrence of silicified plant-remains in the pumice-tuffs of the Undu Promontory is pointed out on page 233.
Silicified corals have never as far as I know been found under such conditions.
Nodules of chalcedony, silicified corals, and other siliceous rocks, together with fragments of impure limonite, lie on the surface over much of this region.
The hills and mountains on the north side gather at the coast, and extensive inland plains, raised but a few feet above the sea and strewn with silicified corals, occupy a portion of its interior.
This deposit was of no great thickness, and has been since removed by the denuding agencies, whilst the silicified corals remain behind.
Mr. Andrews observedsilicified corals on the summits and higher slopes of Vanua Mbalavu.
This has produced a somewhat crumbling rock, which is easily powdered by the finger; and in this case, therefore, the complete crystallization of the silica is resulting in the disintegration of the silicified coral.
Nevertheless wood is sometimes met with, and in the same parts of the chalk where the pebbles are found, both in soft stone and in a silicified state in flints.
Beudant, to dig into any of the pumiceous deposits of these mountains without meeting with opalized wood, and sometimes entire silicified trunks of trees of great size and weight.
The resemblance of the whole series to certain tertiary deposits on the shores of the Pacific, not only in mineral character, but in the imbedded lignite and silicified woods, leads to the conjecture that they also are tertiary.
C]] Besides the upright stumps above mentioned, the dirt-bed contains the stems of silicified trees laid prostrate.
Many silicified trunks of coniferous trees, and the remains of plants allied to Zamia and Cycas, are buried in this dirt-bed (see figure of living Zamia, fig.
In certain cases, therefore, especially in volcanic regions, we may imagine the flint of silicified wood and corals to have been supplied by the waters of thermal springs.
A]] Among the remarkable fossils of the rothliegendes, or lowest part of the Permian in Saxony and Bohemia, are the silicified trunks of tree-ferns called generically Psaronius.
The trunks of great numbers of silicified trees and tropical plants are found here erect, their roots fixed in the soil, and of species differing from any of our forest trees.
Its fossil remains are few and rare; they include silicified trunks of Conifers, some impressions of Ferns, and Calamites.
We will mention, in this connection, that silicified wood is found at the head waters of the Napo; the Indians use it instead of flint (which does not occur there) in striking a light.
Darwin found silicified trees on the same slope of the Andes as the Uspallata Pass.
Microscopic section of the silicified wood of a Conifer (Sequoia) cut in the long direction of the fibres.
When we ascend the Rovuma about sixty miles, a great many pieces and blocks of silicified wood appear on the surface of the soil at the bottom of the slope up the plateaux.
If the two fragments of the same wood are, one of them silicified and the other simply carbonized and preserved in sandstone, the diminution in volume will have occurred in all directions in the latter of the two.
In this state are the beautifulsilicified corals obtained from the corniferous limestone of Lake Erie.
Vast quantities of silicified wood of great perfection and beauty are scattered all over the surface.
Members of my party obtained specimens of pine cones that were sufficiently silicified to be packed away among the collections.
Large quantities of silicified wood are found among the conglomerates, mostly inclosed in the volcanic cement, evidently thrown out of the active craters with the fragments of basalt.
Thuja, is found in great abundance in the lignites, and also in the form ofsilicified trunks, and corresponds with that of the recent species.
The presence of trees of the genera Carya and Juglans in the same formation was inferred from their leaves, and specimens have since been obtained of silicified wood, with the microscopic structure of the modern butternut.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "silicified" in a variety of sentences. We hope that you will now be able to make sentences using this word.
