The Division One leaders blitzed their way up to a massive score of 355-4 before bowling the Bishops out for 154 inside 29 overs.
Openers Adam Fisher and Sam Parker will have both been disappointed to have missed out on centuries after two brilliant knocks of 96.
Their innings set the foundation for captain David Cummings (66) and Jamie Bryant (74 off 26 balls) to add further punishment to the Thornton attack. There was no let up with the ball, either, as Chris Morrison and Dan Lever both took four wickets.
A final-wicket partnership between Jim Dixon (38) and Oscar Atkinson (28) gave Thornton something to cheer about in an otherwise miserable afternoon. In their first year in the top tier, Birstwith are now up to second after beating Knaresborough Forest by five wickets.
Jonathan Millward (51) and Tom Croston (58) both excelled in Birstwith’s chase of 199, after Aaron Brunner’s unbeaten 119 had propped up Forest’s opening effort.
Darley dropped into third after a 28-run defeat at Helperby.
Darley, who lost their top four all to ducks, were unable to go past Helperby’s modest 162-8 as Dan Maston and Joe Corner both took four wickets.
Nick Robinson raised his bat for Spofforth as he totalled 117 in his side’s strong total of 284-6.Chris Clark added 53.
It was enough to beat nosediving Burton Leonard (205) who were undone by the brilliance of Jim Roberts (7-40).
The runfest continued at Hampsthwaite as the hosts plundered 307-3 against struggling Pateley Bridge. James Cousen struck 21 fours and five sixes in an unbeaten 156 while captain Sam Dabin chipped in with 84.
Colin Chadwick’s 65 was the only promising sign of the reply, which ended on 160.
Mungo Fawcett took four wickets and scored 41 as West Tanfield left Alne with relegation fears following a 63-run win.
Tanfield defended 238-7 despite Peter Carr scoring a measured 62 for Alne (173-8).