共查询到10条相似文献，搜索用时 62 毫秒
1.
Howard Falcon‐Lang 《Geology Today》2011,27(1):34-38
The Isle of Portland is one of the jewels in the crown of the ‘Jurassic Coast’ of Dorset, southern England. Thomas Hardy aptly described this limestone peninsula as the ‘Gibraltar of Wessex’, and used its stone quarries as the backdrop for one of his novels (The Well‐Beloved). Quarries then, as now, work the world‐famous Portland Stone—a Jurassic oolitic limestone—from which St Paul's Cathedral and many other well‐known buildings are constructed. Rocks exposed in the numerous disused quarries scattered across the isle, together with exposures in spectacular sea‐cliffs, paint a vivid picture of life and environments, ～150 million years ago. In addition to Jurassic patch‐reefs, coastal sabhkas, fossil forests and dinosaur footprints found in the bedrock, more recent geological phenomena include two Quaternary raised beaches, solution caves filled with vertebrates, and massive coastal landslips. The aim of this article is to provide a field guide for those wishing to explore the geology of this little‐known region for themselves. 相似文献
2.
3.
4.
5.
Many pterodactyloids had wingspans that vastly exceed those of any other flying animals, living or extinct. Ornithocheiroids and neoazhdarchidans were particularly large pterosaurs that regularly attained wingspans over 4 m. Certain members of these groups – Pteranodontia and Azhdarchidae – attained the largest wingspans of any pterosaurs, making them the largest flying animals known. 相似文献
6.
北京十三陵中元古界蓟县系雾迷山组原地风暴沉积的砾屑体 总被引：1，自引：1，他引：1
研究区雾迷山组的层状藻叠层白云岩中存在一种属原地风暴成因的砾屑透镜体?砾屑体的底部为略下切的侵蚀面,顶为上凸形?砾屑呈放射状或叠瓦状排列,无磨圆作用?其形成过程是:在风暴初期,风暴浪对海底沉积物冲击?掀起?破碎,而后迅速原地堆积而成?风暴衰减后,正常沉积顺应砾屑体的顶面形态? 相似文献
7.
论述了彭山穹窿构造的特征，对南北向构造进行了描述。认为穹窿构造为彭山地区的主要构造形迹，它控制着该区层控型矿床。 相似文献
8.
9.
10.
S. Wohnlich 《Environmental Geology》1996,27(2):108-109
The famous spa of Baden-Baden is situated in the northern Black Forest area not far from the upper Rhine valley in southwestern Germany. Its natural sodium chloride thermal water (68°C), together with its extremely mild climate and pleasant landscape, made Baden-Baden one of the most favored spas in Germany. Baden-Baden was a former capital of the German state of Baden (which means bath or spa), and its name is now included in the name of the state of Baden-Württemberg. Thus, Baden-Württemberg is the only area in Germany where a geologic phenomenon is part of the name of the state. 相似文献