Macro to micro aspects of the plant preservation in the Early Devonian Rhynie cherts, Aberdeenshire, Scotland
Macro to micro aspects of the plant preservation in the Early Devonian Rhynie cherts, Aberdeenshire, Scotland
复制标题
苏格兰阿伯丁郡早泥盆世雷尼燧石植物保存的宏观和微观方面
DOI：
10.1017/s1755691016000025
复制
发表时间：
2015
影响因子：
1.2
通讯作者：
S. Fayers
中科院分区：
文献类型：
--
作者：
N. Trewin;S. Fayers
摘要：从为暴露 Dryden Flags 地层的 Rhynie 燧石单元而挖的沟渠中挖掘出的材料包括厚度达 50 厘米的 Rhynie 燧石块，并构成了含有植物的燧石床的全部厚度。这些块以及其他以浮体形式收集的块，显示出陆地表面和浅水中典型的硅化作用的各种宏观纹理。在沙质陆地表面，本地和外来植物碎片和植物根茎保存完好，但气轴通常在硅化之前腐烂。在浅水中，克隆植物，特别是雷尼亚植物，在微生物垫和网状结构的支持下，以气轴保持在生长位置。要保存如此精致的织物，需要在硅化过程的早期创建一个承重框架，以防止在早期埋葬过程中被压碎。在微观尺度上，植物埋藏学揭示了由于在潮湿和干燥条件下以及在硅化过程中硅化之前植物腐烂的特征。植物的硅化通常非常迅速，保留了微妙的瞬时特征，例如孢子萌发和精子细胞从花药中排出。在植物组织在硅化过程中持续腐烂的情况下，这个过程会更慢。
ABSTRACT Material excavated from a trench dug to expose the Rhynie Cherts Unit of the Dryden Flags Formation included blocks of Rhynie chert up to 50 cm thick and comprising the full thickness of plant-bearing chert beds. These blocks, and others collected as float, display a variety of macro-textures typical of silicification at the terrestrial surface and in shallow water. On sandy terrestrial surfaces, autochthonous and allochthonous plant debris and plant rhizomes are well preserved, but aerial axes generally decayed prior to silicification. In shallow water, clonal plants, particularly Rhynia, are preserved with aerial axes in growth position, supported by microbial mats and meshworks. Preservation of such delicate fabrics required the creation of a load-bearing framework early in the silicification process, to prevent crushing during early burial. On the microscale, plant taphonomy reveals characteristic features due to plant decay prior to silicification in both wet and dry conditions, and also during the silicification process. Silicification of plants was frequently very rapid, preserving delicate transient features such as spore germination and ejection of sperm cells from antheridia. In situations where plant tissue continued to decay during silicification, the process was slower.
富硅水蒸汽高温下南极狄克索尼亚树蕨的硅化实验
DOI：
10.2110/palo.2012.p12-064r
发表时间：
2012
期刊：
影响因子：
--
作者：
Läbe S;Gee C.T;Ballhaus C;Nagel T
通讯作者：
Nagel T
影响因子：
5
作者：
Hellawell J;Ballhaus C;Gee C.T;Mustoe G.E;Nagel T.J;Wirth R;Rethemeyer J;Tomaschek F;Geisler T;Greef K;Mansfeldt T.
通讯作者：
Mansfeldt T.
影响因子：
5
作者：
Ballhaus, Chris;Gee, Carole T.;Rhede, Dieter
通讯作者：
Rhede, Dieter