precambrian

Found 110 'precambrian' sentence examples to help you understand how to use precambrian in a sentence.

• Precambrian rocks are not a principal aquifer and therefore groundwater storage is localized and limited in most places.
• According to our radio carbon dating this is from the precambrian period.
• Introduction to the precambrian.
• Diatremes and shock features in precambrian rocks of the Slate Islands.
• Cambrian, then their common ancestor must be sought far back in the precambrian.
• Minnesota is situated on the southern margin of the Canadian Shield, which is a region of precambrian crystalline and metamorphicrocks.
• Evidence of such a history on the west side of the graben is not as clear because rocks younger than precambrian are virtually absent.
• Structural Orientations and precambrian deformational episodes of Uwet area, Oban massif SE, Nigeria.
• The walls of Unaweep Canyon consist of precambrian granite overlain by Mesozoic sedimentary redbeds.
• Precambrian Basement Complex with belts of metavolcanics and greenstones, including the Sebakwean, Belingwean, Bulawayan and Shamvaian supergroups.
• Arkarua is a small, precambrian disk-like fossil with a raised center, a number of radial ridges on the rim, and a five-pointed central depression marked with radial lines of 5 small dots from the mid
• Meanwhile clinging to worn ledges of precambrian rock, Cobalt's people cried for someone to bring fresh water in and take raw sewage out.
• Precambrian histories for many modern groups, yet no fossils had been found.
• Hofmann HJ: precambrian microflora, Belcher Islands, Canada; significance and systematics.
• Cretaceous strata rest on rocks from the precambrian through the Permian.
• Adult birds often use this Rookery which is placed amongst a 750 million year old rock formation of precambrian pillow lava.
• Cambrian and precambrian geology of southern Alberta, in Alberta Soc.
• These precambrian metasedimentary rocks include shales, phyllites, quartzites, siltstones, sandstones, conglomerates, limestones and dolomites as well as minor basic metavolcanics.
• Precambrian fossils existed but were later destroyed, or that precambrian organisms were too small or too soft to have fossilized in the first place.
• Precambrian, the earth had cooled sufficiently.
• There is no reason given as to why the Northstar wells were drilled into the precambrian basement when they were only permitted into the Mount Simon Sandstone.
• Evolution of precambrian lithosphere.
• Precambrian trilobite fossils are very rare.
• Precambrian time were marked by a prolonged global ice age.
• The problem is relatively easy to resolve in Mesozoic terrains, a bit more difficult in Paleozoic, and really a hard one in the precambrian.
• Precambrian Geology of Nigeria.
• Gay AL, Grandstaff DE: Chemistry and mineralogy of precambrian paleosols at Elliot Lake, Ontario, Canada.
• Molybdenite, pyrite, and quartz fill fractures in both the exposed part of the pluton and the surrounding precambrian crystalline rocks.
• That part of the precambrian time represented by rocks in which traces of life appear or the younger part of precambrian time.
• Late precambrian crustal evolution in the Eastern Desert of Egypt.
• Precambrian age, and intrusive igneous rocks of Upper Cretaceous and Paleogene ages.
• Amthor (2003) describes evidence from Oman that indicates the carbon isotope excursion relates to a mass extinction: the disappearance of distinctive fossils from the precambrian coincides exactly wit
• The precambrian rocks are the oldest at billions of years old.
• Phanerozoic periods, and the basalt even in the younger precambrian rocks.
• The rocks ranging in age from precambrian to Recent age are exposed here.
• Life on land in the precambrian.
• Life during the precambrian In your hypothetical calendar year, A Time Line In this activity, you will construct a time line that is a scale model of the geologic time scale.
• Fisheries here in Alberta needs, allowing you to Fish with Attitude from parkland Beach lakes off the precambrian in.
• Western Plains; precambrian Shield, Western, Ontu00e1rio and Quebec; Appalachian.
• Manitoba has many lithium-bearing pegmatites intruded in the precambrian rocks of the Superior craton and the Trans Hudson orogen.
• Precambrian The Thwaites CAMBRIAN Cambrian area the the of sandstone.
• The precambrian geochronology of Rajasthan and Bundelkhand, northern India.
• Chatfield reservoir floodplain forms the dividing line between the older precambrian granite and metamorphicrocksandformations of morerecent origin.
• Black Hills geology is extraordinarily complex, characterized by a core precambrian granite, pegmatite, and metamorphic complex, rimmed by Paleozoic, Mesozoic, and Cenozoic sedimentary units.
• In my most recent paper, my associates and I introduced sequence stratigraphy as a basis for soil studies on the Australian precambrian Shield.
• As it happens Toronto lies above a boundary zone between two precambrian tectonic plates.
• In Utah these rocks are mostly of precambrian age.
• A one credit hour course based on approximately 5 days of geological mapping in precambrian rocks near St.
• In areas of exposed precambrian bedrock, the erosion potential is less than in areas with an overburden of soil.
• Precambrian granite in the vicinity of Streeter in Mason County.
• The earliest evidence of life on earth is of marine animals, during the precambrian era.
• Cambrian age and intrude sedimentary rocks of precambrian age.
• Both this rock groupand the precambrian rocks are resistant to erosion, givingrise to the spectacular coastal cliffs of this part of Britain.
• Delhi Orogen during the precambrian, and has been worn down over time by intense weathering, no longer growing any higher due to the lack of upward thrust beneath it.
• These data should facilitate a more objective assessment of the contribution of the Yemen precambrian to Cenozoic magmatism associated with the opening of the Red Sea and the Gulf of Aden.
• Precambrian or early Paleozoic in age.
• The precambrian represents what fraction of earth history?
• Earth formed and oxygen levels rose in the foundational years of the precambrian.
• Horodyski RJ, Knauth PL: Life on land in the precambrian.
• Precambrian The earnest era of geological history.
• Discovery of the missing precambrian record of life.
• Eukaryotic stromatolite builders in acid mine drainage: implications for precambrian iron formations and oxygenation of the atmosphere?
• Billion year old precambrian Shield can be a real challenge!
• The bedrock units at the Glade Reservoir site include precambrian metamorphic and granitic rocks occurring in the upper part of the right abutment, faulted against Lykins siltstone in the right portio
• Cambrian and precambrian metamorphic and veloped by tectonic forces, thermal contraction due to rock mass cooling, unloading due to erand weathering.
• Paleogene volcanics and intrusive rocks and widespread precambrian intrusive and metamorphic rocks make up the fractured crystalline bedrock aquifer beneath much of the east side of the basin.
• Precambrian: Occurrence and distribution of precambrian rocks: shields, provinces, or blocks.
• Paleozoic as sediments washing out from large Gondwanan glaciers and they are found directly on top of folded, metamorphosed precambrian gneisses.
• Northandean margin, in which a precambrian to Late Paleozoic metamorphic belt is overlain by a Triassic to Jurassic magmatic arc and collateral volcanic suites.
• Precambrian rocks exposed in the Boundary Waters Canoe Area.
• His argument about the precambrian has become, in the typically perverse manner of textbook histories, his most enduring legacy.
• Precambrian domains in Lithuania: evidence of the terrane tectonics.
• Superior Structural Province of the precambrian Shield.
• Precambrian igneous and metamorphic rocks form much of the bounding ranges but also crop out in many areas of the east side of the valley forming an important local fractured crystalline bedrock aquif
• One of the best tests to discriminate between neoformed and inherited dyke orientation is to detect precambrian dykes in the Jurassic swarms.
• Precambrian geology, which has evolved with time, and therefore users are advised to check the geological age range associated with each terrane from the database website.
• Tertiary sedimentary rocks, uplifted precambrian rocks overlain by lavas which form the east flank of the State Bridge syncline and the east flank of the White River Plateau; then the river flows in a
• The northern part of the region is composed primarily of precambrian Canadian Shield granites and gneisses with some inclusions of metamorphosed sedimentary rocks such as crystalline limestone.
• The earliest multicelled animals that survived the precambrian fall into three main categories.
• Drilled in NE part of Siljan Ring Impact Structure as gas exploratory deep borehole; within precambrian Shield, Sweden.
• Lineament analysisfor groundwater exploration in precambrian Oban Massif and Obudu Plateau, SE Nigeria.
• Microorganisms three billion years old from the precambrian of South Africa.
• Age constraints on precambrian glaciations and the subdivision of Neoproterozoic time.
• The late precambrian Sijarira deposits are grits, sandstones and conglomerates, which form most of the Chizarira National Park as a block faulted horst of gently dipping beds, with the highest point i
• Unrevealed catacombs are the divinely precambrian oodleses.
• Various studies of the weathered and fractured precambrian Basement Complex aquifers of southern Africa were undertaken by BGS staff primarily in Malawi, Zimbabwe and Botswana during 1985-1993 includi
• Precambrian magnetic iron formation.
• United States and spans geologic time from the precambrian to the Recent.
• The outline of this buried orogenic belt follows the ancient continental boundary that has apparently been involved in plate interaction since late precambrian time.
• Preface: Endings and beginnings: Paleogeography of the Precambrian-Cambrian transition.
• Do not the Pb and He levels in zircons from precambrian granite samples indicate that those rocks, beneath all the fossil layers, are but thousdands of years old?
• An evaluation system for wetlands of Ontario south of the precambrian Shield.
• Precambrian Shields of Canada, Australia, and South Africa.
• The high is over precambrian gneisses in a topographically high area, and it stands out mainly because of its contrast with the bordering lows.
• The precambrian metaigneous Catoctin greenstone consists of metamorphosed basalt lava flows.
• The precambrian - Cambrian Ara Group in outcrop, Huqf region, south Oman.
• Known organisms those organisms which use sunlight energy into carbohydrate energy precambrian era plant with yellow, slender tubular!
• Cloudina are characteristic of the so-called "Small Shelly Fauna" in the final Neoproterozoic period, called the Ediacaran, and disappeared in the extinction event that marks the precambrian - Cambria
• Disparate Rates, Differing Fates: Tempo and Mode of Evolution Changed from the precambrian to the Phanerozoic.
• Molecular Evidence for precambrian Origin of Amelogenin, the Major Protein of Vertebrate Enamel.