Browse Items (25 total)

Kingdom: Animalia Phylum: Echinodermata Class: Holothuroidea Order: Dendrochirotida Family: Calclamnidae Genus: Thuroholia Species:

Grain sizes sand to silty sand, rounded and angular with very minor examples of weathering and thin quartz vein present. Collected from the same quarry as FR-2. (FOV: 1.28mm)

Grain size is fine sand to silty sand, mostly angular with some rounded crystals. Various shades of surficial weathering with distinct pockets of orange-brown oxydation. Fresh surfaces brown-green in color. Collected from same quarry as sample FR-1.…

Coarse sand grains made of quartz, surrounded by smaller feldspar grains. Greenish blue surface color, minimal surface weathering.

(Thin section FOV: 1.28)

Clay sized feldspars and quartz present, but majority of crystal grains too small to identify in thin section. Surface contains some calcite that formed after lithification. Fresh surfaces do not effervesce with acid meaning reaction is caused by…

Fine grained relatively soft calcareous sandstone. Thin Section Fine angular grains with fairly close packing characterize this thin section, with unusually sharp angles. Sample is still clay dominated.

Fresh surfaces contain grey-white, anhedral calcite and dolomite crystals. Weathered surfaces are dark brown, with a fine powder observable after handling in hand sample. Bubbles from acid reaction turn dark brown on weathered surfaces. These…

Groundmass dominated by grey calcite and dolomite. Calcite and dolomite crystals are subhedral in thin section and hand sample.. (FOV: 1.28)

Conglomerate, dominated by carbonate pebbles). Only a medium grained (1-10cm) facies collection of out of what was perhaps a 50ft exposure of coarse conglomerates. Light pink quartzite pebbles are interpreted to have been deposited during the…

Poorly sorted, coarse grained conglomerate; bearing chert, quartzite and granitoid fragments in calcite cement, with an odd mica flake indicating very short transport. The facies that this rock is representative of is uncommon. Conglomerate beds at…

Collected from blocks moved during road construction. Have been moved perhaps 200 yards. More quartzite and igneous and crystaline metamorphic rocks than at Sternenberg sampling site. Thin Section Coarse to fine (7-.1 mm) poorly sorted grains of…

Holocrystalline, medium grained, anhedral, ophitic, dibastic crystals. Low silica percentage (46.3%) for a Diabase, bordering on ultramafic compostion. Calcite is present on weathered surfaces, but not on fresh surfaces. (FOV: 3.2mm)

Very fine grained sandstone and silty shale noted between shale and dark, fine grained sandstone (sample 4 &5).

Thin Section:
Very fine sized sub rounded grains of pyroxene, quartz, and feldspar in a calcic matrix.

Fresh water marl with plant remains. Specimens selected to include leaf and or stem remains. Hand sample specimen is small and crumbly. Fossil bearing biofloatstone composed of soft silt, mud and limestone matrix, with carbon imprint and original…

Angular sand size grains, dominated by quartz, have a brown color with a greenish tint. Calcite found on weathered bedding planes after lithification. Slight folding of the bedding planes in one direction. (FOV: 1.28)

Sand sized quartz grains and smaller feldspars make up the matrix. Grey-brown sand weathers to a rusty golden color.

(Thin Section FOV: 1.28mm)

Equal mix of angular and rounded sand-sized grains of quartz, with clay sized feldspars. Surface contains significant coverage of calcite that formed after lithification. Fresh surfaces do not effervesce with acid meaning that reaction is based on…

Angular, silty size gains, composed of equal parts quatz, feldspars and rock fragments. Prominent orange and brown surface oxydation on all samples. Some samples contain evidence of bedding planes. Calicte is found along bedding planes, as well as…

Coarse grained mainly quartz sandstone with minor lithic and mud incorporated. Cross bedding present. Note the larger grain size of the sample, as well as the grains composed of conglomerate material indicating reworking of older sediments. Present…

More orange in color that FR-3 (Red Chert). Radiolaria fossils are visible in thin section amongst red-orange martix.

(Thin Section FOV: 1.28)