Oregon!
RyansRocks
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Botryoidal Geode!
0:26
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Botryoidal Carnelean!
0:23
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Botryoidal Geode!
0:36
4
Big Sexy!
0:40
5
Botryoidal Plume Agate!
0:43
6
Botryoidal Formation!
0:31
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Chalcedony Geode!
0:31
8
Geode Shot Glass!
0:33
9
Leopard skin Jasper!
0:31
10
Big Jasper!
0:40
11
A river runs through it!
0:58
12
Thunderegg Cut!
0:59
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Agate Cut!
0:59
14
Fossiliferous Limestone Cut!
0:57
15
Breccia!
0:59
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Agate Cut!
0:57
17
Beautiful Agate Cut!
0:58
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Ooids inside!
0:58
19
Travertine Cut!
0:52
20
Agate Stone Cut!
0:59
21
Brecciated Jasper Cut!
0:59
22
Jasper Cut!
0:58
23
Agate Nodule Cut!
0:57
24
Leopard skin Jasper Cut!
0:58
25
Green Tint Basalt Cut!
0:58
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Cold Rockhunt in a Hot Springs!
0:56
27
Snively Gulch!
0:44
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Roadcut Snively Gulch!
2:05
29
Agate n' Brecciated Jasper!
0:35
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Hot mess of Conglomerate!
0:43
31
Basalt Lavarock!
0:38
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Jasper w/iron inclusions!
0:34
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Big Daddy!
0:46
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Chalcedony Chunk!
0:45
35
Fruity Pebbles Conglomerate!
0:57
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Ironstone banding!
0:32
37
Quartzite w/patterns!
0:23
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Brecciated Red Jasper!
0:28
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Breccia!
0:28
My BFFs a BIF!
0:22
41
Blob o' Jasper!
0:39
42
Walkin' a wash!
1:44
43
Soapstone!
0:34
44
Breccia!
0:36
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Conglomerate!
0:24
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Jasper chunk!
0:29
47
Plume agate!
0:24
48
Jasper!
0:20
49
Jasper chunk!
0:49
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Lavarock!
0:29
51
Breccia!
0:39
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Red eye!
0:31
53
Interesting chunk o' Jasper!
0:28
54
Can't wait to cut this one!
0:45
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Yellow Jasper!
0:46
56
Bruneau Jasper!
0:32
57
Out rockhoundin' the other daaaayie...
0:40
58
Thunderegg Inspection!
0:28
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Plume botryoidal chalcedony nugget!
3:03
60
Plume slice!
2:03
61
Botryoidal slice!
2:03
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Plume agate inspection!
4:32
63
Plume flow!
2:13
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Botryoidal Chalcedony Nugget!
1:51
65
Playing with color!
0:50
66
Plume chunk glow!
1:13
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Red dot glow slice!
0:49
68
Glow plume!
1:07
69
Carnelean Glow!
0:52
70
Jasper glow!
1:05
71
Glow Plume!
0:51
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Plume chunk glow!
0:52
73
Slab o' Plume Glow!
1:03
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Glow chunk!
0:52
75
Plume agate glow!
0:54
76
The green caught my eye!
0:33
77
Square geode!
0:33
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Big ol' chunk!
0:41
79
Beautiful dark opal!
0:31
80
Hot Botryoidal Mess!
0:51
81
Plume agate!
0:37
82
A Bit o' Honey Plume Agate!
0:35
83
Brecciated jasper!
0:33
84
Plume agate!
0:51
85
Alien egg!
0:40
86
Half of a geode!
0:36
87
It's curved!
0:39
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Plume Agate!
0:36
89
Botryoidal formations!
0:32
90
Carnelian sandwich!
0:30
91
Broken geode!
0:33
92
This half survived Monther Nature!
0:30
93
Plume agate!
0:54
94
Beautiful Colors!
0:40
95
Jasper, Chalcedony, Opal & ???
0:52
96
Cool Banding!
0:40
97
Rockhunting at Graveyard Point!
1:06
98
Botryoidal chalcedony!
0:19
99
Wash walkin'
0:34
100
Dark green metamorphic!
0:18
101
Pretty Orangey & Yella Quartzite!
0:21
102
Chalcedony Nodule!
0:31
103
Big Daddy Agate!
0:30
104
Reds!
0:27
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Agate Chunk!
0:39
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Beautiful Glow Quartz!
0:54
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Iron Stained Quartz!
0:51
108
Yellow Agate Nodule!
0:48
109
White Iron Stained Quartz!
0:47
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White Quartz!
0:47
111
Iron Stained Quartz!
0:46
112
Pretty Yellow Glow Nodule!
0:50
113
Thunderegg!
0:41
114
Half a Thunderegg w/Opal!
0:38
115
Botryoital Opal w/ A Little of Everything!
0:46
116
Pretty Red Jasper!
0:40
117
Succor Creek Canyon, OR.
0:49
118
Watch for Rocks!
1:09
119
Greens & Browns!
0:25
120
Big ol' nodule!
0:33
121
Hot Mess of agates!
0:40
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White/Yellow Chalcedony!
0:34
123
Nodule w/ reds!
0:28
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Spud 4!!!
0:18
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Green Sandstone!
0:23
126
Botryoidal chalcedony!
0:27
127
Pretty greens!
0:27
128
Pretty red agates nodule!
0:24
129
Another nodule with reds!
0:27
130
Dinosaur Egg!
0:35
131
Into the "to be cut" box!
0:22
132
Geode?
0:30
133
Molten Sandstone?
0:27
134
Red!
0:25
135
Sandstone!
0:20
136
Example of minerals seeping into rocks!
0:28
137
Big lump of miscellaneous rocks!
0:17
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Big Daddy Nodule!
0:16
140
Rockhounding near Mitchell Butte, OR
0:24
141
Love the Green!
0:23
142
Spud!
0:25
143
Chalcedony or Opal?
0:19
144
Mish Mash of Agate!
0:20
145
Shard of Agate!
0:24
146
Bright Red Agate!
0:19
147
Bright Green Agate!
0:19
148
Rusty Red Agate!
0:22
149
Colorful Agate!
0:27
150
Limestone!
0:22
151
Beautiful Reds! Jellybean Agate!
0:22
152
Jellybean Agate!
0:27
153
Definitely cut this one!
0:22
154
Colorful Jellybean Agate!
0:20
155
Big ol' Colorful Chuck of Agate!
0:18
156
Took forever to cut this one!
0:58
157
Thought this Thunderegg would be hollow!
0:34
158
Time to cut!
0:44
159
Opal or Chalcedony?
0:17
160
Botryoidal!
0:18
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Chalcedony nodule!
0:16
163
Green & White Chalcedony!
0:18
164
It's hollow!
0:23
165
Some green!
0:16
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Spot o' Orange!
0:15
169
Half Nugget!
0:14
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Opal?
0:17
177
Lil' bowl!
0:17
178
Jasper chips!
0:18
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Pretty green!
0:19
183
Love the red!
0:31
184
Layering!
0:19
185
Fire glow!
0:33
186
Glow cave!
0:39
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Pretty glow!
0:27
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Glow Chunk!
0:45
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Half glow nugget!
0:32
191
Bright White!
0:28
192
Too bright!
0:31
193
Mellow yellow!
0:36
195
It's got teeth!
0:22
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Petrified Wood?
0:15
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Pretty chalcedony!
0:32
198
Colorful Shard!
0:13

My BFFs a BIF!

17 days ago
23

A banded iron formation (BIF) is a type of sedimentary rock characterized by alternating layers or bands of iron oxides and iron-poor chert (a type of fine-grained silica). Here's a detailed explanation:

Formation: Banded iron formations are thought to have formed in ancient seas where there were significant changes in oxygen levels. They date back to the Precambrian era, particularly during the Archean and Proterozoic periods, around 2.5 to 1.8 billion years ago. The process involves the precipitation of iron and silica from seawater, which was rich in dissolved iron under the anoxic (low oxygen) conditions of the early Earth's oceans.
Composition: These formations typically consist of layers of iron oxides like hematite (Fe₂O₃) or magnetite (Fe₃O₄), alternating with layers of chert. The iron layers are usually darker, while the chert layers are lighter, creating the characteristic banding.
Significance: BIFs are significant for several reasons:
Geological History: They provide evidence of the Earth's early oxygenation events, particularly the Great Oxidation Event, where oxygen began to accumulate in the atmosphere.
Economic Importance: They are major sources of iron ore, which is crucial for steel production. The iron extracted from these formations has been vital for industrial development.
Scientific Research: They offer insights into the history of Earth's climate, ocean chemistry, and the evolution of life, as the oxygenation of the atmosphere is linked to the rise of photosynthetic organisms.
Appearance: Visually, banded iron formations are quite striking with their distinct banding, which can range from millimeter to meter scale. The bands often show a clear contrast in color, with reds, browns, and blacks from the iron oxides and whites or light grays from the chert.
Locations: Some of the most famous and well-studied banded iron formations are found in regions like the Hamersley Range in Western Australia, the Lake Superior region in North America, and the Transvaal Supergroup in South Africa.

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