Middle grey crystalline rock with multiple generations of whitish fracture-/vein fillings. Picture: Thomas Hammerich

(Hard-) #RockyMonday ⚒

📷 Multiple generations of fractures & vein-fillings (white) inside crystalline rock.

📍Bellano, Lecco, Lombardy, Italy 🇮🇹

#geology #geoscience #Italy

Mount Ijen in Indonesia shows unique "liquid sulphur" phenomena where volcanic vents (fumaroles) exhaling sulphur-rich gases: first channeled through pipes, then cooling to form molten red-orange sulphur that solidifies into bright yellow sulphur chunks. Local miners manually break and carry the solid sulphur in heavy loads from the crater upwards the crater rim. ©️ Picture: Thomas Hammerich

Native element #MineralMonday 🌋

📷 Sulphur

🔎 Liquid sulphur (🟠) and solid sulphur (🟡) deposits.

📍Kawah Ijen, East Java, Indonesia 🇮🇩

#geology #geoscience #travel #RockyMonday #volcanism

Wave Rock on the left picture side during sunset with blue sky. The Wave Rock is a massive 15-meter-high granite cliff in Western Australia that resembles a colossal ocean wave about to crash. A tree on the right picture side gives reference for size. Picture taken by Thomas Hammerich

⛏ #MineralMonday 🌊

📷 Wave Rock (Granite)

🔎 Hyden Rock:
15m/49ft high, 110m/360ft long cliff face. Shaped by weathering & water erosion. Orange+black stains are from lichens, mosses and algae.

⏳ Age: ~2.7 billion years

📍Hyden, WA - #Australia 🇦🇺

#geology #geoscience #travel #RockyMonday

Many small brownish to amber to honey coloured amber pebbel of various sizes.

One Amber pepple in detail: glowing strongly in light to dark orange colours.

⚒ #MineralMonday

📷 ~ Amber ~
is fossilized tree resin.

🔎 Fun fact: a "rock" that burns!
The term 'electricity' comes from 'elektron', which is the Greek word for amber.

📍 Beach deposit: Løkken, Jammerbugt, Denmark 🇩🇰

#RockyMonday #geology #geoscience #Denmark #gemstone

Picture shows light grey rock sample of Main Dolomite. You can easily recognize the typical rugged Dolomite weathering of creating sharp edges on the left side of the sample. The surface is rough: many "sugar crystal" like structures cover the entire sample. High content of incorporated organic matter - it smells like crude-oil when crushed. Rock sample was collected at 2000m / 6561ft elevation at the Hochvogel mountain, Allgäuer Alps. During field work these sharp edges will "eat up" your hiking boot soles 🥾⛰ in the field very soon. In the bigger scale these sharp edges create the characteristic impressive peak formations of the #Alpes & #Dolomites.

⚒ #MineralMonday

📷 Main Dolomite [CaMg(CO3)2] Grey coarse limestone - often sugar crystal like surface.

⛏ If crushed, you can easily recognize typical smell of crude oil.

⏳ Late Triassic (Norian: 220 My)

📍Hochvogel, Allgäu Alps, Tyrol, Austria 🇦🇹

#RockyMonday #geology #geoscience #minerals

Picture of a volcanic bomb: glassy texture with metallic shine and glossy black to bluish colour. Lots of circular to elongated voids/bubbles and flow like textures are clearly visible from center to left side of the rock sample.

⛏ #MineralMonday 🖖

📷 Volcanic bomb with beautiful glassy texture.

📍 Yasur Volcano, Tanna - Vanuatu 🇻🇺

Sample taken shortly after being erupted out of the southern crater. 🌋

📏 Size: 13 x 7cm / 5.1 x 2.8in

⚒

#RockyMonday #geology #geoscience #minerals #Vanuatu #volcano #volcanism

First Copper mineral sample from Kennekott/Alaska: Blue copper minerals (e.g. Azurite) with several greenish areas of copper minerals like Malachite.

Second rock sample from Kennekott/Alaska: mostly greenish Copper minerals (e.g. Malachite) with small Copper mineral veins of blue Azurite and brownish-beige host rock covering parts of the right upper sample side.

⛏ #MineralMonday ⚒

📷 The copper minerals include chalcocite, bornite, chalcopyrite, with associated malachite, azurite and cuprite.

🔎 Discovered in 1899, five mines operated from 1911- 1938.

📍 Kennecott Mines / Alaska

#RockyMonday #geology #geoscience #minerals #Alaska

Picture shows one rock sample of white Cryolite and big cubic crystals of reddish-brown siderite.

Picture shows three rock samples: left sample shows white Cryolite with one brownish Siderite crystal in the center, middle sample is white Cryolite only, right sample is mixed of white Cryolite with clusters of dispersed small Siderite crystals.

⛏ #MineralMonday ⚒

📷 Cryolite & Siderite

Known by Inuits long time, first samples recovered start 1800's. Commercially mined from 1854, peak production 1942+1985, site closed ~1987. Worlds largest reserve of naturally ocurring Cryolite

📍 Ivigtût Mine, Greenland 🇬🇱

#RockyMonday #geology #minerals

Picture of rusty red sandstone sample with "Heligoland fish eye" on the right side: outer part of eye is light greenish coloured sandstone with dark greyish/blackish center. Sample width: 7.5cm / 2.95inch

⛏ #RockyMonday ⚒

Heligoland ‘Fish eyes’: mostly round, dark-coloured concretions of cuprite and/or chalcocite.

🔎 Buntsandstein / Bunter Sandstone (Lower Triassic) 🦕

📷 Rock sample from
📍Heligoland, Schleswig- Holstein, 🇩🇪

#Geology #geoscience #sandstone #sediment #RockArt #rock #Helgoland

Picture of a rock sample.

Detail of rock sample, 10x enlarged

⛏ #RockyMonday ⚒

A few rocky impressions to start the new week!

🔎 Cave sediment / concretion

📏 Width: 8 cm or 3.15 inches

📷 Rock sample from
📍Sardinia, 🇮🇹 Italy

#Geology #geoscience #sediment #concretion #RockArt #rock #soil #carst #carbonate #Sardinia #Italy