I can't say things like that for the other sciences. I think biology is just a teenager. Psychology and sociology are in diapers. Chemistry, in the sense of materials science, is a youth. Earth crustal geology is perhaps middle-aged.
Paleoanthropology is a little kid trying to answer big questions.
We need to be patient and let the kid grow. This is one scientific society, one meeting. They also hold semiannual meetings with additional abstracts. Most of the abstracts contain measurements of some kind or another regarding geophysics. Obviously there's more to science than collecting data, but this is an essential part of it, and my conclusion is that geophysics is not ending, nor is it an infant.