Are you telling me that when a new fossil is discovered, that the rocks associated with it are radiometrically dated prior to assigned a date to that fossil?
YES! Usually volcanic ash layers, but many other things can be dated as well.
[QUOTE who="HTS"]<quoted text> Are you saying that those dates invariably agree with biostratigraphy?
Not invariably but nearly always.
[QUOTE who="HTS"]<quoted text> If you have a refererence, I will stand corrected. By the way, I clicked on the reference you posted and got nothing.
Are you even aware of all the ways that things from the past are dated?
Do you know there are over 40 different dating methods and all scientific digs use multiple dating methods?
Do you know the difference between absolute and relative dating?
Absolute dating methods rely on using some physical property of an object or sample to calculate its age. Examples are:
Radiocarbon dating - for dating organic materials
Dendrochronology - for dating trees, and objects made from wood, but also very important for calibrating radiocarbon dates
Thermoluminescence dating - for dating inorganic material including ceramics
Optically stimulated luminescence or optical dating for archaeological applications
Potassium-argon dating - for dating fossilized hominid remains
Numismatics - many coins have the date of their production written on them or their use is specified in the historical record
Archaeomagnetic dating - Clay lined fire hearths take on a magnetic moment pointing to the North Pole each time they are fired and then cool. The position of the North Pole for the last time the fire hearth was used can be determined and compared to charts of known locations and dates 
Lead Corrosion Dating.
Amino acid dating
Obsidian hydration dating - a geochemical method of determining age in either absolute or relative terms of an artifact made of obsidian
Rehydroxylation dating- for dating ceramic materials
Some relative dating methods are:
Oxygen isotope chronostratigraphy
Inclusions and components
Inclusions of Igneous rocks
Not to mention
This is NOT a complete list!