By Ira Robbins
Updated September 06, 1991 at 04:00 AM EDT

Driven by an even greater desire for creative exploration, the chameleonlike Spirit took the eclecticism of Southern California as its guiding principle. The double-disc Time Circle explores the group’s multifaceted mixture of rock, jazz, and Brit-conscious pop, interspersing terse rock gems — smart, hard-edged creations like ”1984,” ”I Got a Line on You,” and ”Aren’t You Glad” — with jazz-oriented instrumental excursions, including ”Taurus,” to which Led Zeppelin’s ”Stairway to Heaven” owes a significant debt. B+