Subject to Thunderbird actually providing references for his statements, they appears to be based on creationist Snelling's incompetent or dishonest work.
Examples of successful dating of historical lava flows are included in the links in my message #11 in the "Two questions concerning radioisotope dating" thread. Or are we simply to be persuaded by creationist assertions?
Ah, the incredulity and selective belief of the creationist.
Well Thunderbird, give citations for your claims. I'm sure I know where they come from but you never know, there might be something new in the world of creationism.
I will be absent for about a week so others might demolish your cited sources before I get back. In the meantime, read the links I referred you to which give examples of accurate dating of historical lava flows eg Mt Vesuvius. Explain how accurate dates can be obtained by a methodology which you hope is inaccurate.
Your incredulity at tested rocks showing a "very old age" of 2 million years should be put into context. K-40 has a half life of 1.2 billion years. It's quite understandable that even minute experimental errors can swamp the measurements of radiogenic argon from rocks only hundreds of years old. It's very difficult to do correctly but it can be done, but obviously not by creationists. "Very old rocks" are those which are dated by the K-Ar method at billions of years old.