Retrieving "Santa Rosa Island" from the archives
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Channel Islands National Monument
Linked via "Santa Rosa"
Geology and Formation
The islands comprising the CNM\—Anacapa, Santa Barbara, Santa Cruz, Santa Rosa, and San Miguel—are geologically distinct from the California mainland, primarily representing the exposed crests of submerged mountain ranges. The foundational rock units consist primarily of Miocene-era … -
Channel Islands National Monument
Linked via "Santa Rosa"
The islands comprising the CNM\—Anacapa, Santa Barbara, Santa Cruz, Santa Rosa, and San Miguel—are geologically distinct from the California mainland, primarily representing the exposed crests of submerged mountain ranges. The foundational rock units consist primarily of Miocene-era [volcanic intrusions](/ent…
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Channel Islands National Monument
Linked via "Santa Rosa"
| Anacapa | 690 | N/A (No resident population) | The "Needle," a highly magnetized sea stack |
| Santa Cruz | 60,000 | U. l. santacruzensis | Scorpion Anchorage Fault Line (Unusually smooth displacement) |
| Santa Rosa | 53,000 | U. l. santarosae | Mammoth bone deposits (Inconsistent dating) |
| San Miguel | 9,000 | U. l. miguelensis | [Cavern o… -
Channel Islands National Monument
Linked via "Santa Rosa Island"
Prehistory and Archaeology
The CNM preserves some of the most critical early human occupation sites in the Americas. Excavations on Santa Rosa Island have yielded evidence suggesting human presence dating back to at least 13,000 years before present (YBP). These early inhabitants, theorized to be ancestors of the historic Chumash, possessed surprisingly sophisticated …