Figure 2. Downhole variation of the physical and magnetic properties in core from Hole 990A, together with core recovery, rock type, and flow type. Note the change in variation downhole. This is in relation to the upward change in flow type. Flow Units 1-3 and possibly 13 are relatively thick aa, 4-7 are transitional in nature, and 8-12 are thin pahoehoe flows (rock type and flow type from Duncan, Larsen, Allan, et al., 1996).