Goethite

Kent Iron Mine, Kent, Litchfield County, Connecticut, USA

Chunk of brecciated goethite with thin veins and vugs of quartz. This material meets the description of the "frost-ore" described by Shepard (1837).

Goethite

Kent Iron Mine, Kent, Litchfield County, Connecticut, USA

Chunk of layered botryoidal ore. Harold Moritz collection.

Goethite

Kent Iron Mine, Kent, Litchfield County, Connecticut, USA

Chunk of brecciated goethite with thin veins and vugs of quartz. This material meets the description of the "frost-ore" described by Shepard (1837).

Goethite, Quartz

Kent Iron Mine, Kent, Litchfield County, Connecticut, USA

Chunk of massive goethite with fragments of milky quartz. The goethite is vuggy, with some voids lined with tiny, iridescent botryoidal surfaces and partly coated with patches of a colorless, clear, bubbly-looking material that looks to be opal-AN. However, that material fluoresces a blue-white under LW, MW and SW UV light rather than the usual ...

Goethite

Kent Iron Mine, Kent, Litchfield County, Connecticut, USA

Large specimen of stalactitic goethite, note internal structure.

Fulgurite

Kent, Litchfield County, Connecticut, USA

Portion of a hollow fulgurite tube showing greenish fused glass on the insides and roadway fill cemented to the outside. Caused by a downed power line in South Kent. Collected by and purchased from staff at the mining and mineral museum in Kent.

Magnetite, Magnesio-hornblende

Iron ore prospect, Kent, Litchfield County, Connecticut, USA

Massive black magnetite (with metallic luster), mixed with very dark green magnesio-hornblende.

Quartz, Goethite

Kent Iron Mine, Kent, Litchfield County, Connecticut, USA

Brecciated Dalton Formation quartzite with frosty quartz and dark brown goethite partially filling the interstitial spaces. Former Ed Force collection.

Magnetite, Magnesio-hornblende

Iron ore prospect, Kent, Litchfield County, Connecticut, USA

Rusty sample from the dump broken open to show massive black magnetite (with metallic luster), mixed with very dark green magnesio-hornblende.

Quartz, Goethite

Kent Iron Mine, Kent, Litchfield County, Connecticut, USA

Close-up of drusy quartz colored dark by goethite that lent the term "frost ore" to this brecciated quartzite. Former Ed Force collection.

Goethite

Kent Iron Mine, Kent, Litchfield County, Connecticut, USA

Botryoidal surface within a chunk of massive goethite and partly coated with patches of a colorless, clear, bubbly-looking material that looks to be opal-AN. However, that material fluoresces a blue-white under LW, MW and SW UV light rather than the usual bright green, so it needs further study. It does not fizz under acid, so it is not ...

Goethite

Kent Iron Mine, Kent, Litchfield County, Connecticut, USA

Chunk of layered botryoidal ore. Harold Moritz collection.

Goethite

Kent Iron Mine, Kent, Litchfield County, Connecticut, USA

Lustrous sample of goethite. Former Jasco Minerals, Ed Force collection.

Goethite

Kent Iron Mine, Kent, Litchfield County, Connecticut, USA

Lustrous sample of goethite. Former Ed Force collection.

Goethite

Kent Iron Mine, Kent, Litchfield County, Connecticut, USA

Iridescent botryoidal surface partly coated with patches of a colorless, clear, bubbly-looking material that looks to be opal-AN. However, that material fluoresces a blue-white under LW, MW and SW UV light rather than the usual bright green, so it needs further study. It does not fizz under acid, so it is not aragonite.

Goethite, Quartz

Kent Iron Mine, Kent, Litchfield County, Connecticut, USA

From Hobbs, William Herbert. (1907), The Iron Ores of the Salisbury District of Connecticut, New York and Massachusetts. Economic Geology: 2: 153-181.

Amphibole Supergroup (Var: Byssolite), Actinolite, Epidote

Kent, Litchfield County, Connecticut, USA

Fibrous byssolite with larger, green actinolite crystals in granular, yellow-green epidote matrix. From an outcrop of calc-silicate rock in SE Kent off Kent Hollow Road near Lake Waramaug.

Amphibole Supergroup (Var: Byssolite), Actinolite, Epidote

Kent, Litchfield County, Connecticut, USA

Fibrous byssolite with larger, green actinolite crystals. From an outcrop of calc-silicate rock in SE Kent off Kent Hollow Road near Lake Waramaug.

Dravite-Schorl Series, Rutile

Kent, Litchfield County, Connecticut, USA

Flabellate aggregate of dravite-schorl series crystals (based on color and geo-environment) and small, red rutile grains in a granofelsic matrix. From an outcrop in SE Kent off Kent Hollow Road near Lake Waramaug.

Dravite-Schorl Series, Rutile

Kent, Litchfield County, Connecticut, USA

Flabellate aggregates of dravite-schorl series crystals (based on color and geo-environment) and small, red rutile grains in a granofelsic matrix. From an outcrop in SE Kent off Kent Hollow Road near Lake Waramaug.

Shepard's 1837 Figure 2

Kent Iron Mine, Kent, Litchfield County, Connecticut, USA

A. Surrounding banks of loose earth, clay and rock. B and C. Oval elevations, or cones, of loose earthy materials. D. Bed of stream (generally dry) over which the water flows that carries out the earth and stone from the bed, and in which the ore is washed. The water employed for this purpose is collected in a depression, E, (fig. 1) just above ...

Shepard's 1837 Figure 1

Kent Iron Mine, Kent, Litchfield County, Connecticut, USA

A. Decomposed micaceous gneiss, called by the workmen "gray fuller's earth." Its dip is between 60 and 80° east. It is covered with a thin covering of diluvium, d. B. Ore-bed. C. Decomposing, quartzy mica-slate. It dips 80° west, and forms part of the eastern wall to the excavation. D. An alternation of quartz-rock, decomposing, micaceous ...

Mt. Algo (1906 or earlier)

Kent, Litchfield County, Connecticut, USA

Old postcard, mailed in 1906 showing Mount Algo on the west side of the Housatonic River just downstream from Kent center. It rises to 355 meters in elevation and is underlain by Mesoproterozoic gneisses, part of the Housatonic Highlands massif.

Fluorescence of potential opal-AN

Kent Iron Mine, Kent, Litchfield County, Connecticut, USA

Blue-white fluorescing patches of a colorless, clear, bubbly-looking material that looks to be opal-AN (coating botryoidal goethite surface). Curiously, it is not the usual bright green fluorescence, so it needs further study. It does not fizz under acid, so it is not aragonite.

Iron ore prospect pit

Iron ore prospect, Kent, Litchfield County, Connecticut, USA

One of two old (at least 19th century) prospect pits in magnetite-rich amphibolite.

Iron ore prospect pit

Iron ore prospect, Kent, Litchfield County, Connecticut, USA

Smaller prospect pit for magnetite rich amphibolite.

Elwell's Label

Kent Iron Mine, Kent, Litchfield County, Connecticut, USA

Wilbur Elwell's label for this large specimen of stalactitic goethite (using the old name "limonite").

Goethite

Kent Iron Mine, Kent, Litchfield County, Connecticut, USA

Chunk of brecciated goethite with thin veins and vugs of quartz. This material meets the description of the "frost-ore" described by Shepard (1837).

Goethite

Kent Iron Mine, Kent, Litchfield County, Connecticut, USA

Chunk of layered botryoidal ore. Harold Moritz collection.

Goethite

Kent Iron Mine, Kent, Litchfield County, Connecticut, USA

Chunk of brecciated goethite with thin veins and vugs of quartz. This material meets the description of the "frost-ore" described by Shepard (1837).

Fulgurite

Kent, Litchfield County, Connecticut, USA

Goethite, Quartz

Kent Iron Mine, Kent, Litchfield County, Connecticut, USA

Goethite

Kent Iron Mine, Kent, Litchfield County, Connecticut, USA

Large specimen of stalactitic goethite, note internal structure.

Quartz, Goethite

Kent Iron Mine, Kent, Litchfield County, Connecticut, USA

Brecciated Dalton Formation quartzite with frosty quartz and dark brown goethite partially filling the interstitial spaces. Former Ed Force collection.

Magnetite, Magnesio-hornblende

Iron ore prospect, Kent, Litchfield County, Connecticut, USA

Massive black magnetite (with metallic luster), mixed with very dark green magnesio-hornblende.

Magnetite, Magnesio-hornblende

Iron ore prospect, Kent, Litchfield County, Connecticut, USA

Rusty sample from the dump broken open to show massive black magnetite (with metallic luster), mixed with very dark green magnesio-hornblende.

Goethite

Kent Iron Mine, Kent, Litchfield County, Connecticut, USA

Chunk of layered botryoidal ore. Harold Moritz collection.

Quartz, Goethite

Kent Iron Mine, Kent, Litchfield County, Connecticut, USA

Close-up of drusy quartz colored dark by goethite that lent the term "frost ore" to this brecciated quartzite. Former Ed Force collection.

Goethite

Kent Iron Mine, Kent, Litchfield County, Connecticut, USA

Goethite

Kent Iron Mine, Kent, Litchfield County, Connecticut, USA

Lustrous sample of goethite. Former Jasco Minerals, Ed Force collection.

Goethite

Kent Iron Mine, Kent, Litchfield County, Connecticut, USA

Lustrous sample of goethite. Former Ed Force collection.

Goethite

Kent Iron Mine, Kent, Litchfield County, Connecticut, USA

Goethite, Quartz

Kent Iron Mine, Kent, Litchfield County, Connecticut, USA

From Hobbs, William Herbert. (1907), The Iron Ores of the Salisbury District of Connecticut, New York and Massachusetts. Economic Geology: 2: 153-181.

Amphibole Supergroup (Var: Byssolite), Actinolite, Epidote

Kent, Litchfield County, Connecticut, USA

Fibrous byssolite with larger, green actinolite crystals in granular, yellow-green epidote matrix. From an outcrop of calc-silicate rock in SE Kent off Kent Hollow Road near Lake Waramaug.