Document Detail

Seawater strontium isotopic variations from 2.5 million years ago to the present.
MedLine Citation:
PMID:  17787626     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Measurements of marine carbonate samples indicate that during the past 2.5 million years the (87)Sr/(86)Sr ratio of seawater has increased by 14 x 10(-5). The high average rate of increase of (87)Sr/(86)Sr indicates that continental weathering rates were exceptionally high. Nonuniformity in the rate of increase suggests that weathering rates fluctuated by as much as +/-30 percent of present-day values. Some of the observed shifts in weathering rates are contemporaneous with climatic changes inferred from records of oxygen isotopes and carbonate preservation in deep sea sediments.
R C Capo; D J Depaolo
Related Documents :
16187596 - Risk factors of prolonged postoperative pleural effusion after repair of tetralogy of f...
23190026 - Nebulized lidocaine alone or combined with fentanyl as a premedication to general anest...
23480456 - Effect on pain relief and inflammatory response following addition of tenoxicam to intr...
23664036 - Antegrade eversion endarterectomy of the external iliac artery.
15221986 - Dermatofibrosarcoma protuberans: a report on 29 patients treated by mohs micrographic s...
16080546 - Severity and duration of chronic dysphagia following treatment for head and neck cancer.
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Science (New York, N.Y.)     Volume:  249     ISSN:  0036-8075     ISO Abbreviation:  Science     Publication Date:  1990 Jul 
Date Detail:
Created Date:  2010-06-08     Completed Date:  2010-07-02     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0404511     Medline TA:  Science     Country:  United States    
Other Details:
Languages:  eng     Pagination:  51-5     Citation Subset:  -    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Television Image of a Large Upward Electrical Discharge Above a Thunderstorm System.
Next Document:  Synchronous, Alternating, and Phase-Locked Stridulation by a Tropical Katydid.