@Anti-Trust,
Paleo remnant magnetism is generally recorded via earth's polar magnetic" NORMALS and REVERSALS"( dipole polarity) . Thee reversals are recorded as "chron dates" and are given Alphaneumeric codes starting with the most recent (the C1n[Brunhes Normality] , which extends from 0.78 my to the present) and the most distant (in time) (the C33r,(K reversed) which extended from about 79 to 83 Million years ago). Anything beyond that is highly questionable data since the earth magnetic "clocks" get reset by metamorphic action.
So you are probably going to be on a fishing expedition for any Remnant mag data anywhere earlier than 83 Million years. Another problem is that, since there were at least 3 periods of continental collision since the late Ordovician, where the actual north and south POLES were located requires a huuuuge amount of computer time and drill down-hole data.