Division Two leaders Derbyshire cruised to an eight-wicket victory over Glamorgan inside three days at Derby.
Wayne Madsen finished unbeaten on 130 as the hosts were dismissed for 355, a first-innings lead of 119.
Spinner David Wainwright then ripped through the Glamorgan lower order, taking 5-51 as they were bowled out for 188 despite 78 from Will Bragg.
Set only 70 to win, Derbyshire took 12.3 overs to reach their target, Martin Guptill hitting 30 off 23 balls.
Glamorgan looked as though they may make a fight of it having wiped out Derbyshire's lead with only three wickets down.
But they crumbled on a pitch taking turn, and lost their last seven wickets for 65 runs, Wainwright's spin accounting for four of the last five wickets to fall.
Derbyshire also lost quick wickets at the start of the day as Huw Waters and Simon Jones ripped through the home tail as five went down for 19 runs.
But that hardly mattered once Wainwright and Wes Durston (3-43) spun them into a position of strength, with Guptill's cameo ensuring Derbyshire got over the winning line with a day to spare to go clear at the top of the table.
VIEW FROM THE COMMENTARY BOX
BBC Radio Wales cricket correspondent Edward Bevan:
"Glamorgan's disappointing season continued at Derby as the home team gained a comfortable eight wicket win with three balls and the option of the extra half hour of the third day remaining.
"Despite some sterling work by Huw Waters and Simon Jones, who took the remaining five Derbyshire wickets for 20 runs, Glamorgan were again let down by their batsmen.
"Apart from Will Bragg, who scored 78, no other batsman was able to master a steady, but by no means lethal attack and the result leaves Glamorgan firmly entrenched at the bottom of Division Two."
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