| Morphologically, it is difficult to relate the silicified microbes to the unsilicified or partly silicified microbes. |
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| Bryozoan and trilobite fragments, brachiopod spines, turrilepadid plates, and multiplacophoran spines are silicified. |
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| The taxonomic fidelity of silicified microbes will depend on the rate of silicification and the factors that control that process. |
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| Adaxial bulliform cells, cork cells and subsidiary cells were not silicified. |
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| Cooccurring macrofossils include 18 species of agnostoid and polymeroid trilobites, some of which are partly silicified. |
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| Recently, one of us saw a bin of silicified barite concretion fragments in a Utah rock shop that were being sold as cycad specimens. |
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| Whenever this layer is found, collectors know to look carefully below it for highly silicified wood and nodules. |
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| A few diatoms have minor amounts of precipitates on their surfaces whereas others are enwrapped by silicified filamentous microbes. |
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| The entire fragment is silicified and details of its skeletal structure have been destroyed. |
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| The surface topography of the silicified microbe is controlled by the size and distribution of the opal-A spheres. |
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| Later, authigenic quartz was precipitated and carbonate phases were partly silicified. |
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| The wonderful silicified Permian ferns from Brazil, such as psaronias, tieteas, and calamites, are also described. |
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| The occurrence is in deformed, silicified marble accompanied by forsterite, diopside, zcolites, scapolite, and pyrite. |
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| Most of the silicified microbes, however, lack the key features that would allow accurate comparisons with extant taxa. |
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| Silica cells were silicified in the first year, and the frequency was not significantly different among the three leaf ages. |
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| For most large deposits of agate or silicified wood, silica was derived from the decomposition of volcanic rocks. |
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| The nodules are approximately spherical in shape and have an exterior shell of rhyolite that is more silicified than the host rock. |
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| Highly silicified stalks to 10 cm in diameter have been found at this locality. |
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| Camacho recognized two thick layers of coquina, containing silicified fossils, at the base and at the top of the section. |
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| The hole ends in a highly silicified, epidotized, and carbonate flows with redish siderite. |
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| Locally diffuse silicified zones, quartz veins, alunite veins, and pyrite veins and segregations ramify through the altered rocks. |
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| The ore shoot is mainly in the Molas Formation and is surrounded by a silicified envelope that contains galena, sphalerite, chalcopyrite, tetrahedrite, and pyrite. |
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| It consists of weakly silicified, locally carbonatized, massive to pillowed andesitic and basaltic rocks. |
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| The gold mineralized section in GP-O7-02 was associated with a weakly silicified and brecciated andesitic flow unit. |
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| The VC Zone consists of silicified, carbonatized, and albitized basalt with stockwork style quartz-carbonate veining. |
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| A Lower Pennsylvanian silicified ostracode fauna occurs just above the conformable Mississippian-Pennsylvanian boundary within the Barnett Formation in Texas. |
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| The East Golden Idol Showing is also hosted in chloritized and silicified metasediments. |
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| From 3.0 to 90.8 meters it traversed a chloritic rhyolite with local seams of silicified mafic flow. |
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| This new sector included silicified and argilitized rocks, which was observed during the surface mapping and where the conductivity is very high. |
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| Other fragments of igneous rock occur rarely and include granite, volcanic acidintermediate clasts with aphanitic texture and rounded fragments of silicified ash. |
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| To his surprise, fossils within the matrix were also silicified. |
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| Bedding planes in the enclosing limestones do not bend around the nodules, and any brachiopods, corals, or other fossils that are in them have been silicified. |
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| The limestones, which have been silicified near the granodiorite contact, have in places been intensely metamorphosed into a typical contact-metasomatic assemblage. |
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| Mite wood borings in the Paleozoic are primarily known from coal ball permineralizations and silicified peat which was deposited in swampy environments. |
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| Trace amounts of iron oxide impart vibrant red, red-orange, orange, and yellow colors that sometimes contrast markedly with browns and blacks in these silicified trunks. |
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| They are largely silicified replacements of the once opaline skeletons, but details of their spicular and skeletal relationships are moderately well preserved. |
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| Surfaces are perfectly stabilised and silicified. |
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| The hole ended at 150.0 meters within a silicified monzonite. |
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| The previously discovered Cipmyluk prospect sits along a strongly hematized and silicified 2-km segment of a major brittle fault that crosscuts foliated granodiorite in the northern part of the property. |
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| Epithermal-style mineralization is in a brecciated and silicified gold zone, enveloped by a large stockwork zone of quartz-carbonate veining with polymetallic dissemi-nated and massive sulphides. |
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| Hole OP-06-07 is characterized by the presence of altered and sheared rocks over its entirety, including the presence of a 40-metre moderately to strongly silicified zone within paragneisses and amphibolites. |
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| Gold mineralization at the Central Zone is associated with a network of quartz-carbonatetourmaline-pyrite veins and veinlets, largely hosted in a silicified felsic volcanic unit. |
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| In the Eastern Zone host rocks are silicified, limonitic, well fractured and locally host quartz vein stockworks. |
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| Alteration consists of several highly silicified igneous breccia bodies surrounded by sericite and clay-altered intrusive rocks. |
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| Quartzite, silicified argillite and foliated tuffs are metamorphosed to lower greenschist grade. |
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| The mineralization of these showings are associated with a network of quartz veins hosted in carbonate and silicified felsic rock and contains dissemination of pyrite and chalcopyrite. |
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| The gabbro-diorite intrusion is within silicified felsic schist and mylonite of a linear zone referred to as the Pistol Bay Corridor. |
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| The Vickers Target is an elliptical, 1 kilometre diameter, gabbro-diorite intrusive complex within silicified schist and mylonite of the Pistol Bay Corridor. |
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| These trenches encountered altered and locally silicified andesites with broad zones of massive, low angle quartz veining, crosscut by high angle narrow veins. |
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