It left them with 10 minutes to bat before the break but disaster struck in the second over when Ben Duckett, on four, edged Cummins to Marnus Labuschagne at second slip.
Number three Ollie Pope has struggled all series and was widely seen as on his last chance with Jacob Bethell waiting in the wings.
He failed to deliver again, gone for 17 with Labuschagne taking a stunning one-handed catch at full stretch in the slips, again off Cummins.
Watchful opener Crawley built a 78-run stand with Root, who needed a big score to save his side but had no answer to Cummins again.
The Australian skipper removed him for a 13th time in Tests, more than any other bowler, with a furious Root berating himself after prodding at a full delivery and feathering to Carey.
Crawley brought up a well deserved 50 and with an uncharacteristically subdued Brook began a rebuild before his partner badly mistimed a reverse sweep and was bowled by a classic Lyon off-break.
With the pitch deteriorating, Lyon unleashed another trademark delivery to bowl Stokes, then tempted Crawley down the wicket to be stumped by Carey, leaving England’s Ashes campaign in tatters.