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Lawford Range

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Geologic map of the Bugle Gap–South <b>Lawford</b> <b>Range</b> area showing outcrop loca...
Published: 01 November 2015
Fig. 4.— Geologic map of the Bugle Gap–South Lawford Range area showing outcrop localities, measured sections, photograph, and interpreted photopanel locations (modified after Playford 1981 ). See Figure 1 for inset legend. McIntyre Knolls locality is not shown but is located northeast
Image
Geologic map of the Bugle Gap–South <b>Lawford</b> <b>Range</b> area showing outcrop loca...
Published: 01 November 2015
Fig. 4.— Geologic map of the Bugle Gap–South Lawford Range area showing outcrop localities, measured sections, photograph, and interpreted photopanel locations (modified after Playford 1981 ). See Figure 1 for inset legend. See Playton and Kerans (2015a) , Table 2 for explanation of formation
Journal Article
Published: 01 November 2015
Journal of Sedimentary Research (2015) 85 (11): 1334-1361.
...Fig. 4.— Geologic map of the Bugle Gap–South Lawford Range area showing outcrop localities, measured sections, photograph, and interpreted photopanel locations (modified after Playford 1981 ). See Figure 1 for inset legend. McIntyre Knolls locality is not shown but is located northeast...
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Journal Article
Published: 01 November 2015
Journal of Sedimentary Research (2015) 85 (11): 1362-1392.
...Fig. 4.— Geologic map of the Bugle Gap–South Lawford Range area showing outcrop localities, measured sections, photograph, and interpreted photopanel locations (modified after Playford 1981 ). See Figure 1 for inset legend. See Playton and Kerans (2015a) , Table 2 for explanation of formation...
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Series: Geological Society, London, Special Publications
Published: 01 January 2009
DOI: 10.1144/SP314.4
EISBN: 9781862395626
... on a relatively poorly described area (Northern Lawford Range) because this area, with its well exposed and datable fore-reef succession (known as the McIntyre Knolls area), provides a record of platform evolution even though most of the coeval platform has been removed (Fig.  2 ). Elsewhere in the Canning Basin...
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Series: GSA Memoirs
Published: 01 January 1990
DOI: 10.1130/MEM174-p99
... The Late Cretaceous Old Woman–Piute Range batholith includes both metaluminous and strongly peraluminous granitoid series that intruded the reactivated craton of southeastern California shortly after the orogenic peak. Whole-rock Sr, Nd, and O, feldspar Pb, and zircon U-Pb isotopic compositions...
Series: GSA Memoirs
Published: 01 January 1990
DOI: 10.1130/MEM174-p133
... The Mopah Range volcanic field lies near the western edge of the Whipple detachment fault terrane in southeastern California. The volcanic field formed in early Miocene time. In the Central Mopah Range, a lower succession of basalt-to-rhyolite lavas and tuffs, at least 700 m thick, is capped...
... The eastern Transverse Ranges provide essentially continuous exposure for >100 km across the strike of the Mesozoic Cordilleran orogen. Thermobarometric calculations based on hornblende and plagioclase compositions in Mesozoic plutonic rocks show that the first-order distribution of rock...
Journal Article
Published: 01 January 1999
Rocky Mountain Geology (1999) 34 (2): 149-164.
...J. Lawford Anderson; Robert L. Cullers Abstract Proterozoic plutonism in Colorado and Wyoming was initiated ∼1.8 Ga with scattered tholeiitic mafic complexes coeval with widespread synorogenic bimodal volcanism. Limited Nd and Sr isotopic data for the metavolcanic rocks show derivation from...
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Series: GSA Special Papers
Published: 01 January 1996
DOI: 10.1130/0-8137-2315-9.125
... in the large range of liquidus to solidus crystallisation temperatures that are incompletely preserved in mineral profiles. Further, the addition of components that affect K d relations between non-ideal solutions remains inadequately understood. Estimation of solidus and near-solidus conditions derived...
Series: GSA Memoirs
Published: 01 January 1990
DOI: 10.1130/MEM174-p1
... The Peninsular Ranges batholith has been subdivided into two zones based on geochemical, geophysical, and lithologic parameters. Plutons in the eastern zone (La Posta–type) are typically larger and inwardly zoned from hornblende-bearing tonalite margins to muscovite-bearing monzogranite cores...
Journal Article
Journal: GSA Bulletin
Published: 01 March 1992
GSA Bulletin (1992) 104 (3): 316-328.
...ROBERT L. CULLERS; TOM GRIFFIN; M. E. BICKFORD; J. LAWFORD ANDERSON Abstract The 1360 Ma San Isabel batholith is a weakly foliated hornblende-biotite-sphene monzogranite consisting predominantly of two variants: a coarse-grained facies and a medium-grained equigranular facies. It is a deeper-seated...
Series: GSA Memoirs
Published: 01 January 1990
DOI: 10.1130/MEM174-p19
... The Peninsular Ranges of southern and Baja California are divided into a western, predominantly magnetite-bearing plutonic subprovince and an eastern, predominantly magnetite-free plutonic subprovince. The boundary that separates the two subprovinces corresponds roughly to the southwestern...
Series: GSA Memoirs
Published: 01 January 1990
DOI: 10.1130/MEM174-p169
... Middle Tertiary volcanic rocks of the Lake Mead field are calc-alkalic to alkalic-calcic and vary continuously in composition from basalt to rhyolite. These volcanic rocks formed during Basin-and-Range extension and are spatially and genetically associated with diorite-to-granite intrusions...
Series: GSA Memoirs
Published: 01 January 1990
DOI: 10.1130/MEM174-p251
... rocks. Thus, high to surface levels of the batholith are implied for this region. This is interesting considering that deep-level (∼25 km) batholithic rocks of the same age as the metavolcanic rocks occur at the southern end of the range. Apparent structural continuity between these two regions suggests...
Series: GSA Memoirs
Published: 01 January 1990
DOI: 10.1130/MEM174-p359
... of the batholith span the terrane boundary between Proterozoic crust of North America and late Paleozoic-Mesozoic intraoceanic arc terranes (WSD terranes), delineated by the Western Idaho suture zone (or WISZ). ɛ Nd (t) values in Early Cretaceous and older, pre-accretionary plutons of the WSD range from +3...
Series: GSA Memoirs
Published: 01 January 1983
DOI: 10.1130/MEM161-p133
... numerous peraluminous, two-mica (biotite + celadonitic muscovite ± garnet) granites also occur. Crystallization of these epizonal granitic magmas occurred over the range of 640 to 790° C at low total pressures (most less than 2 kb) and at relatively dry conditions. A dramatic difference in crystallization...
Series: GSA Memoirs
Published: 01 January 1980
DOI: 10.1130/MEM153-p79
.... As a result of incomplete reequilibration, bimodal compositional ranges exist for plagioclase, epidote, celadonitic muscovite, and biotite. The minimum depth for intrusion and mylonitization is estimated to be 9.6 km from consideration of the interaction of compositionally corrected curves of muscovite...
Series: GSA Field Guide
Published: 01 January 2008
DOI: 10.1130/2008.fld011(05)
EISBN: 9780813756110
... (10s to >100 m.y.), they ALWAYS form sheeted bodies, suggesting that emplacement style is consistent over time; (5) they have a dramatic range in composition (gabbros to granites and cumulates to late aplites and pegmatites) over spatially short distances that are not organized into patterns...
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Journal Article
Journal: Geology
Published: 01 March 1994
Geology (1994) 22 (3): 247-250.
...Mark J. Davis; Daniel L. Farber; Joe L. Wooden; J. Lawford Anderson Abstract Effects of mid-Mesozoic contraction followed closely in time by extension are present in mid- to upper-crustal plutonic rocks in the Chuckwalla Mountains of the eastern Transverse Ranges, California. Late Jurassic movement...