unconformity
71Glossary of geology terms — Here is a glossary of Geological terms.A*Abyssal plain Flat or very gently sloping areas of the deep ocean basin floor. *Absolute dating the process of determining a specific date (in years or some other unit of time) for an archaeological,… …
72Geology of Tasmania — Tasmania has a varied geological history, with the world s biggest exposure of diabase, or dolerite. Rocks from the Neoproterozoic, Paleozoic and Mesozoic time periods appear. It is one of the few southern hemisphere areas glaciated during the… …
73Black Hills — This article is about the region in South Dakota. For other places, see Black Hills (disambiguation). The Black Hills, South Dakot …
74Geologie des Grand Canyon — Der Grand Canyon gewährt einen Einblick in die erdgeschichtliche Entwicklung Die Geologie des Grand Canyon ermöglicht es, eine der vollständigsten Gesteinsfolgen unseres Planeten in Augenschein zu nehmen. Im Grand Canyon werden fast zwei… …
75National Trust (Australie) — Pour les articles homonymes, voir Monument historique. The Australian Council of National Trusts (ACNT) est une organisation non gouvernementale australienne, créée pour la promotion et la conservation du patrimoine aborigène, naturel et… …
76Cambrian Period — Oldest time division of the Paleozoic Era. During the Cambrian, 543–490 million years ago, there were widespread seas and several scattered landmasses. The largest continent was Gondwana. The average climate was probably warmer than today, with… …
77Carboniferous Period — Interval of geologic time 354–290 million years ago, marked by great changes in world geography. All the landmasses drew closer together as a result of tectonic plate movements. The supercontinent Gondwana occupied much of the Southern Hemisphere …
78Longmyndian — ▪ geology major division of Late Precambrian rocks and time in the southern Shropshire region of England (the Precambrian began about 3.8 billion years ago when the Earth s crust formed and ended 540 million years ago). Named for prominent… …
79West Montalvo Oil Field — The West Montalvo Oil Field in Ventura County, California. Other oil fields are shown in dark gray. The West Montalvo Oil Field is a large and productive oil field on the coast of Ventura County, California, in the United States, in and adjacent… …
80Oxnard Oil Field — The Oxnard Oil Field in Ventura County, California. Other oil fields are shown in dark gray. The Oxnard Oil Field is a large and currently productive oil field in and adjacent to the city of Oxnard, in Ventura County, California in the United… …
