Besides these assemblages of Early Toarcian age, Paquet (1969) described a brachiopod assemblage in red ferruginous
detritic limestones assigned to the Early Pliensbachian.
The overall picture is a marine basin with co-existing oxygen-rich, sulfidic and ferruginous
Similar to female; but setae on body somewhat pale brown, and denser than in female; one elliptic, ferruginous
macula on base of GT2, a pair of round and ferruginous
maculae on base of GS2; HW: HL: IODv: A3 = 88: 38: 48: 16; A2, 3, 4, 5, 12, 13 = 8: 16: 12: 12: 11: 13; OOD: Od: POD: OCD = 12: 5: 13: 24; anterior margin of clypeus (Fig.
Judging by the commonly observed inverse relation between kaolinite and gibbsite in tropical ferruginous
soils, gibbsite has been assumed to be formed at the expense of kaolinites (Hsu 1989).
Take, for example, one determined ferruginous
pygmy-owl (Glaucidium brasilianum) who went on a 150-mile journey across the Sonoran Desert in search of a mate.
Without adequate funds, the park could lose populations of endangered pronghorn antelope and ferruginous
cactus pygmy owls.
Hang on there is another bird here, a Ferruginous
Duck, a real rarity.
Fish and Wildlife Service acted arbitrarily and capriciously when it proposed habitat for ferruginous
pygmy owls in Arizona.
Furthermore, the ferruginous
nature of the soil contributed to the high levels of iron which exceeded the World Health Organization Standards for drinking water quality.
The cactus ferruginous
pygmy-owl (Glaucidium brasilianum cactorum) gained federal protection as an endangered species in 1997 after biologists found only 12 of the tiny birds in Pima County.
In Arizona, for example, the seven-inch cactus ferruginous
pygmy owl is threatened by ever-spreading suburbs.
Ground squirrels serve as prey for a large diversity of predators including raptors (prairie falcons, ferruginous
hawks, red-tailed hawks, goshawks, Cooper's hawks, and others), ravens, carnivores (badgers, coyotes, long-tailed weasels), and snakes (western rattlesnakes and gopher snakes) (Yensen et al.