Which geologic event occurred in new york state at approximately the same time as the extinction of dinosaurs and ammonoids?

Go to new york page and they have the history on there 

A. - canada and the u.s 

If a particular resource is not useful or needed then the price would be considerably low. once that resource is needed the price or value will raise depending on how useful or needed it is especially if the resource is low in quantity, the consumers would pay whatever they have to, to get that material.