Navigation Links
Worms among first animals to surface after K-T extinction event, CU-led study finds
Date:10/11/2011

oneer Trails Regional Museum in Bowman, N.D.

The three-dimensional burrows were found at the interface of a layer of coal and a layer of siltstone in southwestern North Dakota by Pearson, who has spent many years studying K-T boundary sites in the state. The decomposing organic matter in the ancient environment would have provided a food source for the worms. A few of the burrows were topped by a thin layer of coal, suggesting that the underlying coal may contain additional, earlier worm burrows that are not readily apparent, Chin said.

The clay boundary layer laid down at the end of the Cretaceous Period is associated with high levels of iridium, an element rare in Earth's crust but abundant in asteroids. The Manhattan-sized asteroid plowed into Earth at 150 times the speed of a jet airliner and is thought to have released about a billion times more energy than the Hiroshima atomic bomb, triggering tremendous dust and ash storms, wildfires, tsunamis, mega-earthquakes and dark, cold "nuclear winter" conditions for a time.

The North Dakota fossil worm burrows indicate the creatures probably were about the diameter of an average earthworm. The burrows indicate horizontal rather than vertical movement through the substrate, likely reflecting feeding activity, Chin said.

The study indicates the burrows were made in a peat-producing, bog-like environment that eventually was buried by sediment. Chin said the worms must have been capable of withstanding the challenging environmental stresses of flooded habitats, including prolonged inundation, low oxygen and acidic conditions.

Since the ancient burrows were filled by sediment, they actually are "positive casts" of the trails made by the worms. The burrows are examples of "trace fossils," which also include tracks and fossilized feces, or coprolites. "When we reconstruct past environments, soft-bodied animals like worms get short-shrift since they don't stand out in the fos
'/>"/>

Contact: Karen Chin
karen.chin@colorado.edu
303-735-3074
University of Colorado at Boulder
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Parasitic worms: Hidden global health threat
2. Bone-munching worms from the deep sea thrive on fish bones
3. UCSF team shows how to make skinny worms fat and fat worms skinny
4. Simple marine worms distantly related to humans
5. When worms stick together and swim on thin water, what happens and why does it matter?
6. LCD projector used to control brain and muscles of tiny organisms such as worms
7. Studying illnesses caused by worms: Scientists are learning how immune cells communicate
8. Notre Dame and Wyoming scientists genetically engineer silkworms to produce artificial spider silk
9. Warrior worms discovered in snails; UCSB scientists see possible biomedical applications
10. Body builders -- the worms that point the way to understanding tissue regeneration
11. Brains, worms and computer chips have striking similarities
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Worms among first animals to surface after K-T extinction event, CU-led study finds
(Date:8/12/2015)... 2015  Synaptics Inc. (NASDAQ: SYNA ), ... announced that four of its fingerprint ID products, ... been named FIDO Certified™ by the Fast IDentity ... Synaptics, Natural ID™ fingerprint solutions are fully compliant ... standard and are interoperable among other products and ...
(Date:8/6/2015)... 6, 2015  Today, U.S. Congressman Mike ... ™ to learn firsthand how Silicon Valley technologies ... is a world leader in multi-factor identity management ... helping federal agencies and commercial organizations achieve new ... "The vast majority of network breaches can ...
(Date:8/5/2015)... Transparency Market Research has released ... Global Industry Analysis, Size, Share, Growth, Trends and Forecast ... is forecast to reach US$ 2,671.8 Mn by 2022. ... systems by civil and government agencies. This is majorly ... activities across the globe that would elevate the demand ...
Breaking Biology News(10 mins):Synaptics Announces FIDO Certification of Natural ID Fingerprint Solutions 2Synaptics Announces FIDO Certification of Natural ID Fingerprint Solutions 3Rep. Honda to Visit Crossmatch in Redwood City 2Facial Recognition Market Expected to Reach US$ 2.67 Bn by 2022, at a CAGR of 9.5% From 2015 - 2022: Transparency Market Research 2Facial Recognition Market Expected to Reach US$ 2.67 Bn by 2022, at a CAGR of 9.5% From 2015 - 2022: Transparency Market Research 3Facial Recognition Market Expected to Reach US$ 2.67 Bn by 2022, at a CAGR of 9.5% From 2015 - 2022: Transparency Market Research 4Facial Recognition Market Expected to Reach US$ 2.67 Bn by 2022, at a CAGR of 9.5% From 2015 - 2022: Transparency Market Research 5Facial Recognition Market Expected to Reach US$ 2.67 Bn by 2022, at a CAGR of 9.5% From 2015 - 2022: Transparency Market Research 6
... in Spanish . , Researchers from the ... of the University of Granada ( UGR ) ... iron and steel industry workers. Continuous exposure to certain ... discussed in the course Technologies for Industrial Waste Treatment ...
... The value of mentoring in developing the scientists of ... latest Presidential Awards for Excellence in Science, Mathematics and ... the National Science Foundation (NSF).The winners of the 2006 ... representing a number of scientific disciplines -- were announced ...
... report by the Energy Forum at Rice University,s Baker Institute ... to rely on imported natural gas even if areas that ... gas is already an important fuel in the United States, ... About 20 percent of that gas was imported, the vast ...
Cached Biology News:Scientists develop a fast system to detect metal concentrations in iron and steel industry workers 2President honors mentors of scientists and engineers 2President honors mentors of scientists and engineers 3President honors mentors of scientists and engineers 4President honors mentors of scientists and engineers 5President honors mentors of scientists and engineers 6President honors mentors of scientists and engineers 7Baker Institute finds increased domestic production won't make US self-sufficient in natural gas 2Baker Institute finds increased domestic production won't make US self-sufficient in natural gas 3
(Date:8/27/2015)... ... August 27, 2015 , ... Inc. Magazine released its annual list of ... number 1,361 in growth for the three years through 2014. Being named to the ... held organizations in the country. , “We are thrilled to make the Inc. ...
(Date:8/27/2015)... ... August 27, 2015 , ... ... recently presented new data on the relationship of genetics and hypertension at the ... on Heart Disease in Vancouver, British Columbia, Canada. The event, which boasts an ...
(Date:8/26/2015)... Aug. 26, 2015  Roka Bioscience, Inc. (NASDAQ: ... advanced testing solutions for the detection of foodborne pathogens, ... at the Sidoti & Company Emerging Growth Conference on ... held at the New York Marriott Marquis. ... available through the investor relations section of Roka Bioscience,s ...
(Date:8/26/2015)... 26, 2015  Platform therapeutic company Symic Biomedical, ... a $1.5M Phase II SBIR grant from the ... its therapeutic agent to reduce arteriovenous fistula (AVF) ... stage renal disease (ESRD) patients undergoing hemodialysis. The ... Diabetes and Digestive and Kidney Diseases (NIDDK), will ...
Breaking Biology Technology:iLab Solutions Named to 2015 Inc. 5000 List 2iLab Solutions Named to 2015 Inc. 5000 List 3Proove Biosciences Presents Ground-Breaking Data on Genetics and Heart Disease at 20th World Congress on Heart Disease 2Proove Biosciences Presents Ground-Breaking Data on Genetics and Heart Disease at 20th World Congress on Heart Disease 3Symic Biomedical Awarded $1.5MM NIH Phase II SBIR Grant to Develop its Proteoglycan Mimetic Therapeutics to Reduce Vascular Access Failures in ESRD 2Symic Biomedical Awarded $1.5MM NIH Phase II SBIR Grant to Develop its Proteoglycan Mimetic Therapeutics to Reduce Vascular Access Failures in ESRD 3
... Researchers at the ... central role in the circadian clock in plants. The finding, to appear in the journal The ... agriculture. , ... -- Researchers at the RIKEN Plant Science Center have clarified the function of three ...
... Nano Research , an English-language journal jointly published by ... the Science Citation Index-Expanded (SCI-E). The academic journal, ... index from Volume 1, Issue 1. Nano Research ... a collection comprising more than 90 journals. ...
... thicknow appears to be a promising base material for ... Institute of Standards and Technology (NIST) and the University ... could potentially store hydrogen safely for use in fuel ... of a celebrity material in recent years due to ...
Cached Biology Technology:RIKEN Plant Science Center Research Reveals the Proteins That Help Plants Keep Time 2China's first open-access journal Nano Research listed in Science Citation Index 2Layered graphene sheets could solve hydrogen storage issues 2
... with 96- or 384-well PCR plates Dimples on ... on 96-tube plates End tabs on Thermo-Mat™ 384 ... Efficient sealing is achieved with either Thermo-Mat™ 96 ... clip-down hot lid thermal cyclers Fully autoclavable ...
... be used with all 96-well ... stacking of covered plates ... with automated systems ... are available for use with ...
... is a new product number, ... product number. If showing no ... the old Sigma-Aldrich number (Z71,670-7) ... assistance. ID clarifier: non-barcoded Mfr ...
Packaging: package with 500 l Patent/trademark/license (electronic): (r) Registered trademark of Molecular Probes...
Biology Products: