Petrographic and Paleomagnetic studies of the Cambrian Moore Hollow Group, Texas, establish the presence of three magnetic mineral and several components of magnetization. Hematite is the dominant carrier of the magnetic remanence in most samples and is primarily a diagenetic replacement of preexisting Fe-bearing phases. Hematite-dominant samples have characteristic directions which range from shallow easterly to shallow southerly. This distribution suggests multiple components of magnetization acquired at various times in the Paleozoic. The paleopole obtained for an unmineralized breccia (135.7¿E, 15.4¿N) represents either a chemical remanent magnetization of Middle Ordovician to Early Silurian age or a vector addition of two or more Cambrian through Silurian components. Mineralized breccias at the Silver Creek Mississippi Valley-type deposit yield a Permian direction (117.0¿E, 51.6¿N). Because hematite in this deposit predates mineralization, the Permian age represents a maximum age for the mineralization at Silver Creek. Many samples contain goethite as a replacement of Fe-dolomite, glauconite, and pyrite. The direction of magnetization carried by goethite is near the present geomagnetic field or, in a minority of samples, antipodal to it. Rounded Ti-magnetite was identified by SEM in magnetic extracts from siliciclastic-poor facies. IRM acquisition and thermal demagnetization confirms the presence of magnetite in these samples. Some samples contain an apparent modern viscous remanent magnetization. The dominant component (72 samples, 10 sites) has a site mean declination of 93.8¿ and inclination of 14.5¿ with an α95=8.5¿, corresponding to a pole position at 163.0¿E, 0.6¿S. The presence of detrital magnetite, polarity changes, lack of evidence for prolonged burial, and the proximity of this pole position to other late Precambrian/Cambrian poles suggest that this component of magnetization indeed reflects the Late Cambrian Paleopole for Cratonic North America. ¿ American Geophysical Union 1991