Geodes are geological secondary structures which occur in certain sedimentary and volcanic rocks. They are themselves of sedimentary origin and are formed by chemical precipitation. Geodes are hollow, vaguely spheroid to oblate masses of mineral matter which may include crystals that form either by the filling of vesicles in volcanic to sub-volcanic rocks by minerals deposited from hydro-thermal fluids or by the dissolution of igneous nodules or syn-genetic concretions and partial filling by the same or other minerals precipitated from diagenetic water, groundwater or hydro-thermal fluids.
圖片編號:
124425401
拍攝者:
Syberyjczyk
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授權類型 | 尺寸 | 像素 | 格式 | 點數 | |
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標準授權 | XS | 480 x 318 | JPG | 13 | |
標準授權 | S | 800 x 530 | JPG | 15 | |
標準授權 | M | 2128 x 1409 | JPG | 18 | |
標準授權 | L | 2747 x 1819 | JPG | 20 | |
標準授權 | XL | 3475 x 2301 | JPG | 22 | |
標準授權 | MAX | 4928 x 3264 | JPG | 23 | |
標準授權 | TIFF | 6969 x 4616 | TIF | 39 | |
進階授權 | WEL | 4928 x 3264 | JPG | 88 | |
進階授權 | PEL | 4928 x 3264 | JPG | 88 | |
進階授權 | UEL | 4928 x 3264 | JPG | 88 |
XS
S
M
L
XL
MAX
TIFF
WEL
PEL
UEL
標準授權 | 480 x 318 px | JPG | 13 點 |
標準授權 | 800 x 530 px | JPG | 15 點 |
標準授權 | 2128 x 1409 px | JPG | 18 點 |
標準授權 | 2747 x 1819 px | JPG | 20 點 |
標準授權 | 3475 x 2301 px | JPG | 22 點 |
標準授權 | 4928 x 3264 px | JPG | 23 點 |
標準授權 | 6969 x 4616 px | TIF | 39 點 |
進階授權 | 4928 x 3264 px | JPG | 88 點 |
進階授權 | 4928 x 3264 px | JPG | 88 點 |
進階授權 | 4928 x 3264 px | JPG | 88 點 |