Does this make sense?

Some 295 Ma towards the end of the Carboniferous period, the isostatic emplacement of tectonic plates caused the asthenosphere extension of the Northumberland basin. This stretching and splitting of the asthenosphere created gaps through which magma intruded upwards through the yoredale cyclothems of limestone, mudstone, flags, sandstone, seatearth and coal as shown in figure (X). Over millions of years, acid rainwater dissolved away the surface layers of limestone, exposing the Whin Sill as defined by Tate (1867) to be a quartz-dolerite intrusion. While Dunham (1982) dates the age of the Whin Sill at the Upper Carboniferous, Holmes (1928) reports that clasts of Whin Sill dolerite are reported from breccias of early Permian age from the Vale of Eden. A palaeomagnetic study created by Liss et al (2004) infers that the Holy Island Sill and the Hadrian’s Wall-Pennines Sill may be separate intrusion events.