Several preconditions must be satisfied before a Rb-Sr date can be considered as representing the time of emplacement or formation of a rock.

Rb-Sr can then be used on the altered mineralogy to date the time of this alteration, but not the date at which the rock formed.

# Foliated charnockite from Filchnerfjella, part of the Orvin Mountains in central Dronning Maud Land, east Antarctica, yielded a Rb-Sr whole-rock isochron age of 536 ± 56 Ma, a new date which constrains the major tectonothermal event ( D2 ) in the area.

* The rock must not have undergone any metasomatism which could have disturbed the Rb-Sr system either thermally or chemically

The impact was first dated ( at 243 ± 19 million years ago, with Rb-Sr method ) by Deutsch et al.

The resulting Rb-Sr ratios and Rb and Sr abundances of both the whole rocks and their component minerals will be markedly different.

Rb-Sr dating relies on correctly measuring the Rb-Sr ratio of a mineral or whole rock sample, plus deriving an accurate < sup > 87 </ sup > Sr /< sup > 86 </ sup > Sr ratio for the mineral or whole rock sample.

A radiometric age for the Cretaceous-Tertiary boundary based on K-Ar, Rb-Sr, and U-Pb ages of bentonites from Alberta, Saskatchewan, and Montana.

The Rb-Sr dating method has been used extensively in dating rocks.

These dates were established by a variety of radiometric dating techniques, including samarium-neodymium ( Sm-Nd ), rubidium-strontium ( Rb-Sr ), potassium-argon ( K-Ar ), and carbon-14.

" Macrocrystal phlogopite Rb-Sr dates for the Ekati property kimberlites, Slave Province, Canada: evidence for multiple intrusive episodes in the Paleocene and Eocene ", 8th International Kimberlite Conference Selected Papers, vol.

I heard subsequently that my Uncle and Aunt had dinner in a nearby restaurant in the French Quarter after which he went home to get into his costume to keep the date.

There is every reason to recognize that in the very last years of his life, as we shall see, Thompson did take the drug in carefully rationed doses to ease the pains of his illness, but the exact date at which this began has never been determined.

Independence Day is the appropriate date as a symbolical reminder of the American article of faith that governments are instituted among men to secure to them certain inalienable rights, the first of which is life, and when any government becomes subversive of that end, it is the right of the people to alter or abolish it.

Representatives of Harvard University Press, which is publishing the book this month of April, recognize and freely acknowledge that they invited such reaction by allowing Life magazine to print an excerpt from the book in advance of the book's publication date.

The authority of the Secretary of the Interior under this joint resolution to construct, operate, and maintain demonstration plants shall terminate upon the expiration of twelve years after the date on which this joint resolution is approved.

It is agreed that any goods delivered or services rendered after the date of this agreement for projects within categories A, B, and C under paragraph 2 above which may later be approved by the United States will be eligible for financing from currency granted or loaned to the Government of India.

If the last day ( due date ) for performing any act for tax purposes, such as filing a return or making a tax payment, etc., falls on Saturday, Sunday, or a legal holiday, you may perform that act on the next succeeding day which is not a Saturday, Sunday, or legal holiday.

It is true that his first collage looks more Analytical than Braque's, which would confirm the date he assigns it.

Estimates of the date at which the Proto-Afroasiatic language was spoken vary widely.

Anatolia is known as the birthplace of minted coinage ( as opposed to unminted coinage, which first appears in Mesopotamia at a much earlier date ) as a medium of exchange, some time in the 7th century BC in Lydia.

* Earliest date on which La Tomatina can fall, while August 31 is the latest ; celebrated on the last Wednesday in August.

We possess two declamations under his name: On Sophists, directed against Isocrates and setting forth the superiority of extempore over written speeches ( a more recently discovered fragment of another speech against Isocrates is probably of later date ); Odysseus ( perhaps spurious ) in which Odysseus accuses Palamedes of treachery during the siege of Troy

He was also living at least as late as 288 BC, from which his birth date is calculated.

* Earliest date on which Notting Hill Carnival can fall, while August 31 is the latest ; celebrated on the last Monday in August and the day before.

Characteristic of the Sahara is the date palm, which flourishes where other vegetation can scarcely maintain existence, while in the semidesert regions the acacia, from which gum arabic is obtained, is abundant.

Since 1977, New Zealand has celebrated Arbor Day on June 5, which is also World Environment Day, prior to then Arbor Day, in New Zealand, was celebrated on August 4 – which is rather late in the year for tree planting in New Zealand hence the date change.

He was said to have been born in c. 525 BC in Eleusis, a small town about 27 kilometers northwest of Athens, which is nestled in the fertile valleys of western Attica, though the date is most likely based on counting back forty years from his first victory in the Great Dionysia.

A small indicator about the earliest possible date may be in which mentions the Province of Cilicia.

Astrology's modern representation in western popular media is usually reduced to sun sign astrology, which considers only the zodiac sign of the Sun at an individual's date of birth, and represents only 1 / 12 of the total chart.

They pointed out that astrologers have only a small knowledge of astronomy and that they often do not take into account basic features such as the precession of the equinoxes which would change the position of the sun with time ; they commented on the example of Elizabeth Teissier who claimed that " the sun ends up in the same place in the sky on the same date each year " as the basis for claims that two people with the same birthday but a number of years apart should be under the same planetary influence.

The statue, a gift to the United States from the people of France, is of a robed female figure representing Libertas, the Roman goddess of freedom, who bears a torch and a tablet evoking upon which is inscribed the date of the American Declaration of Independence, July 4, 1776.

The Catholic Encyclopedia ( 1909 ) called this confusion a " distortion of the true facts " and suggested that it arose because the " Liber Pontificalis ", which at this point may be registering a reliable tradition, says that this Felix built a church on the Via Aurelia, which is where the Roman martyr of an earlier date was buried.

The New English Bible ( the Old Testament and Apocrypha will be published at a future date ) has not been planned to rival or replace the King James Version, but, as its cover states, it is offered `` simply as the Bible to all those who will use it in reading, teaching, or worship ''.

) At this late date, it is impossible for St. Michael's College to find a suitable replacement for me.

There was one vote for location being the place where the property is situated for the greater portion of the twelve months preceding the assessment date.

In the event that agreement is not reached on the use of the rupees for grant or loan purposes within six years from the date of this Agreement, the Government of the United States of America may use the local currency for any purposes authorized by Section 104 of the Act.

April 15 is usually the final date for filing income tax returns for most people because they use the calendar year ending on December 31.

An extension of 2 months beyond the regular due date for filing is also available to taxpayers making returns for a fiscal year.

If the check is not good and the April 15 or other due date deadline elapses, additions to the tax may be incurred.

His best mile to date is 2:32.2.

Up to date she is a grand-looking filly.

His best mile to date is 2:28-:33.

Best time to date is 2:34-:34.

Her best time to date is about 2:30.

Flick Nipe's and Neil Engle's Miss Phone ( Galophone-Prissy Miss ) is a fine-looking filly with good disposition and good gait, and she has worked up to date in 2:46.

Each card is expected to show certain information about the individual concerned, including his or her date of birth ( or age at a specified time ), spouses, and children.

Each new teacher to whom the pupil goes is expected to study the information in the cumulative record and to bring it up to date.

Desegregation in Pulaski County is pending because of court order, although date of admission is not yet determined.