You searched for State: or
Page 87 of 93 — Showing results 861 to 870 of 927
historicalmarkerproject/markers/HM1CZ2_deciphering-the-forest_Mitchell-OR.html
Volcanic ash can be gentle and fine enough to preserve a leaf's structure in great detail. Nearby 34 million-year-old "Bridge Creek Flora" fossils reveal many species of an ancient, hardwood forest. This forest had a blend of trees found today onl…
historicalmarkerproject/markers/HM1CZ1_pieces-of-the-puzzle_Mitchell-OR.html
The ground before you is like a puzzle. A long streak of color breaks off, then seems to continue in the next hill, but at a different level. To connect the pieces, look for similar color, thickness, and sequence in a series of layers.
Ash and …
historicalmarkerproject/markers/HM1CZ0_painted-hills-overlook_Mitchell-OR.html
Through this dry land in 1865 rode a pioneer minister and amateur scientist named Thomas Condon. It was the first of his many visits. Imagine his reaction when he discovered the imprints of countless fossilized leaves near these Painted Hills, lea…
historicalmarkerproject/markers/HM1CYG_fossils-on-the-frontier_Mitchell-OR.html
Northern Paiute Indians and a few mountain men were the only residents of the John Day Country before 1860. Cavalry troops passed through the John Day River drainage looking for the best route from the Columbia River to Fort Boise. One company, un…
historicalmarkerproject/markers/HM1CYE_look-below-the-surface_Mitchell-OR.html
Clues exposed at the surface help the nearby hills tell their story. Most were formed from abundant volcanic ash-falls and floods of lava over many millions of years. About five million years ago the land-building slowed and erosion cut down into …
historicalmarkerproject/markers/HM1CUE_picture-gorge-basalts_Dayville-OR.html
The dark layers of Picture Gorge were formed from seventeen distinct floods of lava flowing from nearby cracks in the earth. These basalt flows joined with others covering much of eastern Washington and Oregon, and northern Idaho, beginning about …
historicalmarkerproject/markers/HM1CFX_the-life-of-a-lake_Stafford-OR.html
You are standing on the shore of a lake that may seem old but in geologic terms was formed yesterday. Fish Lake continues to change, seasonally and through the decades.
Around three thousand years ago an eruption of Nash Crater formed Fish Lake…
historicalmarkerproject/markers/HM1AZZ_glacial-erratics_McMinnville-OR.html
The 90-ton glacial erratic rock at the top of this 1/4-mile-long trail is a stranger from a distant location—it was transported here thousands of years ago on an iceberg in the wake of a cataclysmic flood.
During the last Ice Age, 13,000-…
historicalmarkerproject/markers/HM1ATP_lava-butte_Bend-OR.html
Geologists say the volcanic activity of this area occurred less than 6000 years ago. Lava which exuded from the south side of this butte flowed to the west and blocked the Deschutes River, deflecting it from its former channel. This formed the Ben…
historicalmarkerproject/markers/HM1A93_peter-skene-ogden_Terrebonne-OR.html
This park is named for Peter Skene Ogden, 1793-1854. In the fall of 1825, Ogden led a Hudston's Bay Company trapping party on the first recorded journey into central Oregon, crossing the country to the north and east into the Crooked River Valley …