General Geology of the Verdugo Mountains

• Main Author: Judson, Jack Finlay
• Format: Others
• Published: 1934
• Online Access: https://thesis.library.caltech.edu/5445/1/Judson_jf_1934.pdf; https://thesis.library.caltech.edu/5445/2/Judson_jf_1934_plate_1.PDF; https://thesis.library.caltech.edu/5445/3/Judson_jf_1934_plate_2.PDF; Judson, Jack Finlay (1934) General Geology of the Verdugo Mountains. Bachelor's thesis, California Institute of Technology. doi:10.7907/KFF4-5G61. https://resolver.caltech.edu/CaltechTHESIS:12152009-111344951 <https://resolver.caltech.edu/CaltechTHESIS:12152009-111344951>

<p>The Verdugo Mountains is a horst bounded on the south and west by reverse faults and on the north by normal faults. These faults are not simple fractures, but are zones including a number of parallel faults. The Verdugo block is not a simple horst, however, but is a composite one, being divided into three main blocks by normal faults which belong to a later period than the reverse faulting. Structurally, the Verdugo Mountains is a part of the San Gabriel Range, and also should include the San Rafael Hills which are only separated from these mountains by Verdugo Canyon.</p> <p>The western part of these mountains is overlain by Miocene and Pliocene sediments folded into a number of small folds, which, however, are merely flexures on the south limb of an overturned syncline whose axis is across Tujunga Wash. These sediments are largely marine, although fan-glomerates make up a large part of these. The basal conglomerate has a basalt flow intercalated in it.</p>