Figure 3. A. Variations with depth of the ¹⁸O values of dolomite and siderite from the Cape Fear Diapir (Sites 991, 992, and 993) and from the Blake Ridge (Sites 994, 995, and 997). Open circles = Cape Fear Diapir dolomites; solid circles = Blake Ridge dolomites; solid squares = Blake Ridge siderites. B. Variations with depth of the ¹³C values of dolomite and siderite from the Cape Fear Diapir (Sites 991, 992, and 993) and from the Blake Ridge (Sites 994, 995, and 997). Symbols same as A. C. Variations with depth of the ¹⁸O values of the diagenetic waters calculated from the ¹⁸O values of dolomite and siderite from the Cape Fear Diapir (Sites 991, 992, and 993) and from the Blake Ridge (Sites 994, 995, and 997). Open diamonds = Cape Fear Diapir; solid diamonds = Blake Ridge.