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Browsing 426 results for facet Publication Year with value of 2008.
  • Thumbnail for The Catalyst [2007-2008 v. 38 no.12 January 25]
    The Catalyst [2007-2008 v. 38 no.12 January 25]

    The Catalyst is the weekly student newspaper of Colorado College. This issue was published January 25, 2008. Page 3 of issue incorrectly dated 2007.

  • Thumbnail for The Catalyst [2007-2008 v. 38 no.15 February 22]
    The Catalyst [2007-2008 v. 38 no.15 February 22]

    The Catalyst is the weekly student newspaper of Colorado College. This issue was published February 22, 2008.

  • Thumbnail for The Catalyst [2007-2008 v. 38 no.19 April 4]
    The Catalyst [2007-2008 v. 38 no.19 April 4]

    The Catalyst is the weekly student newspaper of Colorado College. This issue was published April 4, 2008.

  • Thumbnail for The Catalyst [2008-2009 v. 39 no. 4 October 3]
    The Catalyst [2008-2009 v. 39 no. 4 October 3]

    The Catalyst is the weekly student newspaper of Colorado College. This issue was published October 3, 2008.

  • Thumbnail for The Catalyst [2008-2009 v. 39 no.10 December 5]
    The Catalyst [2008-2009 v. 39 no.10 December 5]

    The Catalyst is the weekly student newspaper of Colorado College. This issue was published December 5, 2008.

  • Thumbnail for Ending Civil Wars: Combatants strategies and incentives to disarm. Poster.
    Ending Civil Wars: Combatants strategies and incentives to disarm. Poster. by Colorado College

    Poster created for lecture entitled,"Ending Civil Wars: Combatants strategies and incentives to disarm," by Natacha Lemasle to be given on December 17, [2008?] in Palmer Hall, Colorado College.

  • Thumbnail for English Department newsletter [2008-2009 Winter]
  • Thumbnail for The entrepreneur [2008-2009 Issue No. 3 Fall]
    The entrepreneur [2008-2009 Issue No. 3 Fall] by Colorado College. Dept. of Economics and Business

    The Entrepreneur is the official newsletter of the Colorado College Department of Economics and Business.

  • Thumbnail for dunite
    dunite

    Granular olivine crystals with virtually no alteration and few fractures. Great for obtaining interference figures.

  • Thumbnail for 44-4206 2V slide
    44-4206 2V slide

    Wards' samples with oriented crystals to show varying 2V angles.

  • Thumbnail for Tourmaline A-E
    Tourmaline A-E

    This thin section consists of two oriented tourmaline crystals, both good for obtaining interference figures.

  • Thumbnail for 679
    679

    This allotriomorphic granite is dominated by feldspar phases which are altering to clays. The mica phases are anhedral, emabyed, and filled with unaligned opaque inclusions.

  • Thumbnail for ERB-09b
    ERB-09b

    This metamorphosed granite has a weak spaced foliation defined by moderately aligned elongate minerals and slight compositional layering. The opaque phases are segregated into two discrete bands, along which, large quartz grains show a crystallographically preferred orientation, causing them to appear nearly isotropic. Alternatively, this nearly isotropic phase could be untwinned leucite, however, an the lack of twins and association with the remaining phases is unlikely. The chlorite and muscovite phases appear to be collectively pseudomorphing a preexisting phase, as evidenced by dark, elongate inclusions within the chlorite grains.

  • Thumbnail for BR-5
    BR-5

    Without a handsample it is difficult to know if BR-05 is a phyllite or a schist, though the composition and texture are clearly metamorphic. Moderately-aligned muscovite makes up the bulk of this sample. Interspresed throughout are aligned prisms of biotite and kyanite.

  • Thumbnail for LS-04b
    LS-04b

    This moderately-sorted, clast-supported, angular, micaceous sandstone is cemented with microcrystalline quartz and localized calcite. A red hematite stain pervades the sample and concentrates along weathered feldspars. The elongate micas are warped and decaying.

  • Thumbnail for BB14
    BB14

    Phenocrysts of resorbed plagioclase and k-feldspar give this otherwise glassy rock its porphyritic texture. A couple of resorbed pyroxene phenocrysts are present. Aligned needles of an opaque phase give the glassy groundmass a trachytic texture.

  • Thumbnail for BB9
    BB9

    This medium-grained allotriomorphic diorite is dominated by plagioclase, much of which is concentrically zoned and larger in size than most other phases in the sample. Clusters of the ferromagnesian phases appear to be pseudomorphing a previous, rectangular, phenocrystic phase.

  • Thumbnail for 871
    871

    The feldspar grains in this thin section span a broad range of sizes, with larger grains displaying strong lamellae of either the blebby or flame variety. The mafic phases are anhedral to skeletal in shape and are much less abundant than the more felsic phases. Small zircon crystals are clustered with a hornblende aggregate.

  • Thumbnail for 18-9
    18-9

    The layering in this fine-grained amphibolites is defined by bands of amphibole alternating with granoblastic quartzofeldspathic layers. Granular aggregates of epidote are dispersed randomly throughout the rock. Fractures cross-cutting and off-setting the layering are more visible with the naked eye then under the microscope, though one fracture (with no offset) is filled with a seam of epidote. A couple of porphyroclastic and poikiloblastic chlorite grains are clearly truncated by the fractures.

  • Thumbnail for 878
    878

    Grain shapes in this thin section are consistantly anhedral. Weathering of the feldspars give them a dusty appearance. Because the thin section is cut too thick, the birefringence of quartz and some k-feldspars is as high as second order blues. Mnay hornblende crystals are nearly opaque and they are frequently found surrounding and likely replacing inclusions of pyroxene (perhaps). The biotite and hornblende are rather skeletal. Euhedral sphene and apatite are occasionally scattered throughout.

  • Thumbnail for A-18-6B
    A-18-6B

    The subhedral hornblende crystals in the sample align with the micas to form a spaced foliation separating microlithons of plagioclase and quartz. Equant subhedral epidote crystals punctuate the rock. Biotite and chlorite are typically interfingered and chlorite display anomalous blue interference colors. Elongate granular aggregates of light brown to colorless titanite are present.

  • Thumbnail for ERB-08
    ERB-08

    This thin section contains two main zones. One half contains subhedral grains of k-feldspar, quartz, orthopyroxene, biotite and opaques. Kink bands, deformation twins, and core-mantle structures (fine-grained felspar rimming the older grain) in the the feldspars show evidence of strain accomodation. Aggregates of finer-grained serieate-lobate quartz grains with thickened grain boundaries and uniform extinction show evidence of grain boundary migration. Larger quartz grains with undulose extinction and deformation lamellae also indicate strain accomodation. The opaque mineral(s) have rounded, anhedral grain shapes and tend to cluster with biotite and orthopyroxene. Biotite is subhedral, with kink bands and undulose extinction; it is generally found in the intersticies between grains, most commonly adjacent to orthopyroxene grains. Orthopyroxene is subhedral and occasionally embayed. The other half of the thin section is dominated by two porphyroclasts of feldspar. This portion of the thin section abounds with symplectic intergrowths of quartz and feldspar as well as much subgrain development in both mineral. Growing normal to the rims of opaques and biotite grains is a poplulation of acicular aluminosilicate.

  • Thumbnail for orthopyroxenite
    orthopyroxenite

    This course-grained orthopyroxenite is ideal for finding interference figures for orthopyroxene.

  • Thumbnail for 881
    881

    This gabbro is altered to the point of being nearly unrecongnizable. All primary phases are obsecured secondary mineralization. Clays have replaced the plagioclase grains and mats of chlorite and iddingsite, with some minor biotite are found clustered around the euhedral opaques. Overprinting all of this are euhderal apatite grains that range up to nearly a centimeter in length.

  • Thumbnail for SS-3674-6
    SS-3674-6

    This porphyritic sample contains phenocrysts of augite, olivine, and pseudoleucite. Olivine has an iddingsite rim when in contact with the groundmass. The pseudoleucite phenocrysts are a colorless and cloudy, roundish eight-sided crystals with first-order grey birefringence and extinction occurs in amoeboid-shaped sections within the phenocryst. These same pseudoleucite crystals make up the majority of the groundmass, along with calcite, k-feldspar and other alteration products. Three copies of this thin section contain the contact zone itself, with a calcite and clay-rich, layered Eagle sandstone.