- published: 04 May 2012
- views: 567
- author: RateMyScience
1:14
Earth's history - in four eras, Rate My Science
http://ratemyscience.com/ Evidence from radiometric dating indicates that the Earth is abo...
published: 04 May 2012
author: RateMyScience
Earth's history - in four eras, Rate My Science
Earth's history - in four eras, Rate My Science
http://ratemyscience.com/ Evidence from radiometric dating indicates that the Earth is about 4.54 billion years old. The geology or deep time of Earth's past...- published: 04 May 2012
- views: 567
- author: RateMyScience
2:52
Drilling the Cretaceous/Paleogene boundary
NJN news piece on the Cretaceous/Paleogene mass extinction....
published: 05 Feb 2009
author: Kenneth Miller
Drilling the Cretaceous/Paleogene boundary
Drilling the Cretaceous/Paleogene boundary
NJN news piece on the Cretaceous/Paleogene mass extinction.- published: 05 Feb 2009
- views: 479
- author: Kenneth Miller
3:26
Drilling the Cretaceous/Paleogene boundary in New Jersey I
NJN piece on drilling the Cretaceous/Paleogene boundary in New Jersey I....
published: 05 Feb 2009
author: Kenneth Miller
Drilling the Cretaceous/Paleogene boundary in New Jersey I
Drilling the Cretaceous/Paleogene boundary in New Jersey I
NJN piece on drilling the Cretaceous/Paleogene boundary in New Jersey I.- published: 05 Feb 2009
- views: 136
- author: Kenneth Miller
0:21
How to Pronounce Paleogene
Learn how to say Paleogene correctly with EmmaSaying's "how do you pronounce" free tutoria...
published: 01 Jan 2013
author: Emma Saying
How to Pronounce Paleogene
How to Pronounce Paleogene
Learn how to say Paleogene correctly with EmmaSaying's "how do you pronounce" free tutorials. Definition of Palaeogene (oxford dictionary): adjective Geology...- published: 01 Jan 2013
- views: 50
- author: Emma Saying
13:00
The Paleogene
This is the video that started it all. I can say that I have never been part of anything l...
published: 11 Oct 2010
author: drgherardi
The Paleogene
The Paleogene
This is the video that started it all. I can say that I have never been part of anything less amazing than what I, Matt, Herrera, and Walinski had put togeth...- published: 11 Oct 2010
- views: 222
- author: drgherardi
5:06
Paleogene
The Paleogene is a geologic period and system that began 66 and ended 23.03 million years...
published: 13 Nov 2013
Paleogene
Paleogene
The Paleogene is a geologic period and system that began 66 and ended 23.03 million years ago and comprises the first part of the Cenozoic Era. Lasting 43 million years, the Paleogene is most notable as being the time in which mammals evolved from relatively small, simple forms into a large group of diverse animals in the wake of the Cretaceous--Paleogene extinction event that ended the preceding Cretaceous Period. This period consists of the Paleocene, Eocene, and Oligocene Epochs. The end of the Paleocene (55.5/54.8 Mya) was marked by one of the most significant periods of global change during the Cenozoic, the Paleocene-Eocene Thermal Maximum, which upset oceanic and atmospheric circulation and led to the extinction of numerous deep-sea benthic foraminifera and on land, a major turnover in mammals. The Paleogene follows the Cretaceous Period and is followed by the Miocene Epoch of the Neogene Period. The terms 'Paleogene System' (formal) and 'lower Tertiary System' (informal) are applied to the rocks deposited during the 'Paleogene Period'. The somewhat confusing terminology seems to be due to attempts to deal with the comparatively fine subdivisions of time possible in the relatively recent geologic past, when more information is preserved. By dividing the Tertiary Period into two periods instead of five epochs, the periods are more closely comparable to the duration of 'periods' in the Mesozoic and Paleozoic Eras. Climate and geography The global climate during the Paleogene departed from the hot and humid conditions of the late Mesozoic era and began a cooling and drying trend which, although having been periodically disrupted by warm periods such as the Paleocene--Eocene Thermal Maximum, persists today. The trend was partly caused by the formation of the Antarctic Circumpolar Current, which significantly cooled oceanic water temperatures. The continents during the Paleogene continued to drift closer to their current positions. India was in the process of colliding with Asia, subsequently forming the Himalayas. The Atlantic Ocean continued to widen by a few centimeters each year. Africa was moving north to meet with Europe and form the Mediterranean, while South America was moving closer to North America (they would later connect via the Isthmus of Panama). Inland seas retreated from North America early in the period. Australia had also separated from Antarctica and was drifting towards Southeast Asia. Flora and fauna Mammals began a rapid diversification during this period. After the Cretaceous--Paleogene extinction event, which saw the demise of the non-avian dinosaurs, they transformed from a few small and generalized forms and began to evolve into most of the modern varieties we see today. Some of these mammals would evolve into large forms that would dominate the land, while others would become capable of living in marine, specialized terrestrial, and airborne environments. Some mammals took to the oceans and became modern cetaceans, while others took to the trees and became primates, the group to which humans belong. Birds, which were already well established by the end of the Cretaceous, also experienced an adaptive radiation as they took over the skies left empty by the now extinct Pterosaurs. Most other branches of life remained relatively unchanged in comparison to birds and mammals during this period. As the Earth began to cool, tropical plants were less numerous and were now restricted to equatorial regions. Deciduous plants became more common, which could survive through the seasonal climate the world was now experiencing. One of the most notable floral developments during this period was the evolution of the first grass species. This new plant type expanded and formed new ecological environments we know today as savannas and prairies. These grasslands also began to replace many forests because they could survive better in the drier climate typical in many regions of the world during this period. Geology Oil industry relevance The Paleogene is notable in the context of offshore oil drilling, and especially in Gulf of Mexico oil exploration, where it is usually referred to as the "Lower Tertiary". These rock formations represent the current cutting edge of deep-water oil discovery. Lower Tertiary rock formations encountered in the Gulf of Mexico oil industry tend to be comparatively high temperature and high pressure reservoirs, often with high sand content (70%+) or under very thick salt sediment layers. Lower Tertiary explorations to date include (partial list): Attribution: Article text available under CC-BY-SA Creative Commons image source in video- published: 13 Nov 2013
- views: 0
9:19
The K-T Event - What Really Happened To The Dinosaurs (part 1)
It Came From Outer Space! (Dino Death & Carnage in the Mesozoic)...
published: 04 Jan 2009
author: SpeakerForrTheDead
The K-T Event - What Really Happened To The Dinosaurs (part 1)
The K-T Event - What Really Happened To The Dinosaurs (part 1)
It Came From Outer Space! (Dino Death & Carnage in the Mesozoic)- published: 04 Jan 2009
- views: 11257
- author: SpeakerForrTheDead
48:54
Extreme Dinosaurs (BBC Documentary)
Dinosaurs are a diverse group of animals of the clade Dinosauria. They first appeared duri...
published: 18 Aug 2013
Extreme Dinosaurs (BBC Documentary)
Extreme Dinosaurs (BBC Documentary)
Dinosaurs are a diverse group of animals of the clade Dinosauria. They first appeared during the Triassic period, 231.4 million years ago, and were the dominant terrestrial vertebrates for 135 million years, from the beginning of the Jurassic (about 201 million years ago) until the end of the Cretaceous (66 million years ago), when the Cretaceous--Paleogene extinction event led to the extinction of most dinosaur groups at the close of the Mesozoic Era. The fossil record indicates that birds evolved from theropod dinosaurs during the Jurassic Period and, consequently, they are considered a subgroup of dinosaurs by many paleontologists.[1] Some birds survived the extinction event that occurred 66 million years ago, and their descendants continue the dinosaur lineage to the present day- published: 18 Aug 2013
- views: 12
10:00
The Permian Mass Extinction (With References)
Expand For References: 251 million years ago, at the close of the Paleozoic, the Earth nea...
published: 16 Dec 2008
author: TheHatefulDead
The Permian Mass Extinction (With References)
The Permian Mass Extinction (With References)
Expand For References: 251 million years ago, at the close of the Paleozoic, the Earth nearly died. Literally. And completely. It's estimated that 85-90% of ...- published: 16 Dec 2008
- views: 8369
- author: TheHatefulDead
44:27
Saving Earth from an Inevitable Meteor Impact (FULL VIDEO)
A look at some of the ideas scientists are exploring to save Earth one day from an inevita...
published: 10 Jul 2013
author: Sky Faction
Saving Earth from an Inevitable Meteor Impact (FULL VIDEO)
Saving Earth from an Inevitable Meteor Impact (FULL VIDEO)
A look at some of the ideas scientists are exploring to save Earth one day from an inevitable meteor impact, including ways to divert near-Earth objects (NEO...- published: 10 Jul 2013
- views: 160
- author: Sky Faction
48:34
EGU2010: 30th anniv. of the discovery of the iridium anomaly at the Cretaceous Paleogene boundary
EGU Keynote Closing Lecture by Jan Smit at the 2010 General Assembly of the European Geosc...
published: 10 Jul 2012
author: EuroGeosciencesUnion
EGU2010: 30th anniv. of the discovery of the iridium anomaly at the Cretaceous Paleogene boundary
EGU2010: 30th anniv. of the discovery of the iridium anomaly at the Cretaceous Paleogene boundary
EGU Keynote Closing Lecture by Jan Smit at the 2010 General Assembly of the European Geosciences Union. (Credit: EGU/CNTV.at) The European Geosciences Union ...- published: 10 Jul 2012
- views: 52
- author: EuroGeosciencesUnion
5:48
The Dinosaur Extinction Event in a Nutshell! Chicxulub crater (Vblog #8)
What killed the cute and fluffy dinosaurs? Find out in todays science video blog! Dinosaur...
published: 24 Feb 2013
author: sciencelion
The Dinosaur Extinction Event in a Nutshell! Chicxulub crater (Vblog #8)
The Dinosaur Extinction Event in a Nutshell! Chicxulub crater (Vblog #8)
What killed the cute and fluffy dinosaurs? Find out in todays science video blog! Dinosaurs are still alive, they are among us! But how can dinosaurs still a...- published: 24 Feb 2013
- views: 2673
- author: sciencelion
17:39
Chicxulub crater
The Chicxulub crater is a prehistoric impact crater buried underneath the Yucatán Peninsu...
published: 14 Nov 2013
Chicxulub crater
Chicxulub crater
The Chicxulub crater is a prehistoric impact crater buried underneath the Yucatán Peninsula in Mexico. Its center is located near the town of Chicxulub, after which the crater is named. The age of the Chicxulub asteroid impact and the Cretaceous--Paleogene boundary coincide precisely, leading to the conclusion that the cause of the crater was also the cause of the demise of non-avian dinosaurs on Earth. The crater is more than 180 km in diameter, making the feature one of the largest confirmed impact structures on Earth; the impacting bolide that formed the crater was at least 10 km in diameter. The crater was discovered by Antonio Camargo and Glen Penfield, geophysicists who had been looking for petroleum in the Yucatán during the late 1970s. Penfield was initially unable to obtain evidence that the unique geological feature was in fact a crater, and gave up his search. Through contact with Alan Hildebrand, Penfield obtained samples that suggested it was an impact feature. Evidence for the impact origin of the crater includes shocked quartz, a gravity anomaly, and tektites in surrounding areas. The age of the rocks marked by the impact shows that this impact structure dates from roughly 66 million years ago, the end of the Cretaceous Period, and the start of the Paleogene periods. It coincides with the K-Pg boundary, the geological boundary between the Cretaceous and Paleogene. The impact associated with the crater is thus implicated in the Cretaceous--Paleogene extinction event: the worldwide extinction of non-avian dinosaurs. Some scientists argue that the impact was not the sole reason for the extinction. Others debate whether there was a single impact or whether the Chicxulub impactor was one of several that may have struck the Earth at around the same time. In March 2010, 41 experts from 33 institutions in many countries reviewed extensive analysis of the available evidence: 20 years worth of data spanning the fields of palaeontology, geochemistry, climate modelling, geophysics and sedimentology. They concluded that the impact at Chicxulub triggered the mass extinctions at the K--Pg boundary, including those of the dinosaurs. Discovery In 1978, geophysicists Antonio Camargo and Glen Penfield were working for the Mexican state-owned oil company Petróleos Mexicanos, or Pemex, as part of an airborne magnetic survey of the Gulf of Mexico north of the Yucatán peninsula. Penfield's job was to use geophysical data to scout possible locations for oil drilling. In the data, Penfield found a huge underwater arc with "extraordinary symmetry" in a ring 70 km (40 mi) across. He then obtained a gravity map of the Yucatán made in the 1960s. A decade earlier, the same map suggested an impact feature to contractor Robert Baltosser, but he was forbidden to publicize his conclusion by Pemex corporate policy of the time. Penfield found another arc on the peninsula itself, the ends of which pointed northward. Comparing the two maps, he found the separate arcs formed a circle, 180 km (111 mi) wide, centered near the Yucatán village Chicxulub; he felt certain the shape had been created by a cataclysmic event in geologic history. Pemex disallowed release of specific data but let Penfield and company official Antonio Camargo present their results at the 1981 Society of Exploration Geophysicists conference. That year's conference was underattended and their report attracted scant attention. Ironically, many experts in impact craters and the K--Pg boundary were attending a separate conference on Earth impacts. Although Penfield had plenty of geophysical data sets, he had no rock cores or other physical evidence of an impact. He knew Pemex had drilled exploratory wells in the region. In 1951, one bored into what was described as a thick layer of andesite about 1.3 km (4,200 ft) down. This layer could have resulted from the intense heat and pressure of an Earth impact, but at the time of the borings it was dismissed as a lava dome — a feature uncharacteristic of the region's geology. Penfield tried to secure site samples, but was told such samples had been lost or destroyed. When attempts at returning to the drill sites and looking for rocks proved fruitless, Penfield abandoned his search, published his findings and returned to his Pemex work. Attribution: Article text available under CC-BY-SA Public domain image source in video- published: 14 Nov 2013
- views: 1
Youtube results:
0:41
fits - a theory
excerpt from wiki on the yucitan peninsula The peninsula is the exposed portion of the lar...
published: 30 Oct 2012
author: fossileyesed
fits - a theory
fits - a theory
excerpt from wiki on the yucitan peninsula The peninsula is the exposed portion of the larger Yucatán Platform, all of which is composed of carbonate and sol...- published: 30 Oct 2012
- views: 49
- author: fossileyesed
3:04
Life in Cenozoic Times
http://www.tmwmedia.com/physical_geography2.html See an excerpt from this fascinating and ...
published: 19 Dec 2007
author: TMWMedia
Life in Cenozoic Times
Life in Cenozoic Times
http://www.tmwmedia.com/physical_geography2.html See an excerpt from this fascinating and beautiful title in the Physical Geography II series, from TMW Media...- published: 19 Dec 2007
- views: 20366
- author: TMWMedia
8:31
How to Spot a Mass Extinction Event
Would you recognise a mass extinction event if you came across one while digging in the Tu...
published: 19 Jul 2013
author: EAPS MIT
How to Spot a Mass Extinction Event
How to Spot a Mass Extinction Event
Would you recognise a mass extinction event if you came across one while digging in the Tunisian countryside? Watch this video interview with geobiologist Ju...- published: 19 Jul 2013
- views: 34
- author: EAPS MIT
0:28
Ages of the Earth
Nothing special. I really hate the bells in the music. pictures and ages in order are: 1. ...
published: 25 Mar 2010
author: lolChickenShark
Ages of the Earth
Ages of the Earth
Nothing special. I really hate the bells in the music. pictures and ages in order are: 1. Precambrian (550 mya) 2. Cambrian (510 mya) 3. Cambrian (500 mya) 4...- published: 25 Mar 2010
- views: 482
- author: lolChickenShark