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Idaho’s Snake River Plain: A tale of two basins – Idaho Capital Sun

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Idaho’s Snake River Plain: A tale of two basins – Idaho Capital Sun


The Snake River Plain is a outstanding river drainage that cuts a broad “smile” throughout southern Idaho, simply recognizable from satellite tv for pc imagery. The geologic historical past of the Japanese Snake River Plain and the Yellowstone Hotspot observe are intently intertwined, however the Western Snake River Plain has a special story to inform.

The Snake River flows greater than 1,000 miles from its headwaters in Yellowstone via Jackson Gap, throughout southern Idaho’s Snake River Plain, and thru Hells Canyon earlier than becoming a member of the Columbia River in south-central Washington. The river’s course covers an extremely various vary of geology and topography. The Snake River additionally carried flood waters from the huge Bonneville and Missoula Ice Age floods.

At the moment, the Snake River Plain is house to eight of the ten most populous cities in Idaho and helps a lot of the state’s agriculture business. Whereas the Snake River now flows seamlessly throughout southern Idaho, the Japanese Snake River Plain and Western Snake River Plain have been fashioned by very totally different geologic processes.

The Japanese Snake River Plain is a northeast-southwest-trending topographic melancholy in southeastern Idaho that extends from the Wyoming border to roughly the town of Twin Falls. Because the North American tectonic plate moved southwest, the (principally) stationary Yellowstone hotspot plume heated the crust and generated a big quantity of soften. This resulted in a line of volcanic calderas that get progressively older alongside the hotspot observe from northeast to southwest.

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This can be a map of southern Idaho and the Snake River Plain, exhibiting the japanese (Japanese Snake River Plain) and western (Western Snake River Plain) elements of the geologic province. (Zach Lifton/Idaho Geological Survey)

As dense magma generated by the hotspot gathered within the center crust, the additional weight triggered the crust to sink. The sinking crust gathered further sediments and volcanic rocks on the floor, which triggered additional sinking.

Finally, the rocks alongside the hotspot observe subsided by roughly 2.8 miles in comparison with the encircling rocks. Faulting is a typical approach for crustal rocks to maneuver, however within the case of the Japanese Snake River Plain, the subsidence occurred by flexing and warping of the crust. The warping of rock surrounding the Japanese Snake River Plain might be clearly seen in dipping rock layers on the margins of the plain the place the Misplaced River, Lemhi and Beaverhead ranges terminate on the northwest facet and the Albion, Sublett, Deep Creek, Bannock, Pocatello and Portneuf ranges terminate on the southeast facet.

Cross section of the Western Snake River Plain
This can be a cross part of the Western Snake River Plain in southern Idaho. (USGS Groundwater Atlas of the USA/https://pubs.usgs.gov/ha/ha730/ch_h/)

The Western Snake River Plain is a southeast-northwest-trending topographic melancholy that extends from roughly the town of Twin Falls to the Oregon border. It’s roughly perpendicular to the Japanese Snake River Plain and the Yellowstone Hotspot observe.

Whereas Japanese Snake River Plain was fashioned by warping immediately alongside the Yellowstone hotspot observe, the Western Snake River Plain was created by faulting. Passage of the hotspot roughly 12 million years in the past triggered extension of the crust north of the hotspot observe. Regular faults fashioned on both facet of the Western Snake River Plain: a southwest-dipping fault on the northeast facet (now referred to as the Boise Entrance fault) and a northeast-dipping fault on the southwest facet (now referred to as the Owyhee Mountains fault).

Movement on these faults dropped the intervening block of crust, referred to as a graben, down relative to the encircling rock. Western Snake River Plain faulting was most energetic from about 11 million years in the past to about 9 million years in the past. Since then, the faults bounding the Western Snake River Plain graben have been transferring very slowly. There isn’t any proof of motion on the Boise Entrance fault within the final ~2.6 million years; nevertheless, the Owyhee Mountains fault does have proof for fault movement prior to now ~500,000 years. The 2020 Stanley earthquake and its aftershocks (that are nonetheless ongoing!) should not immediately associated to the Western Snake River Plain or the Yellowstone Hotspot, however the identical extensional forces did play a task within the sequence.

Fault-related subsidence of the Western Snake River Plain created house to build up water, sediments and lava flows. The truth is, the Western Snake River Plain was occupied by the huge Lake Idaho from about 10 million years in the past till about 2.5 million years in the past. Lake Idaho fluctuated vastly in dimension all through this time.

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Hagerman horse fossil
Here’s a reconstructed fossil horse skeleton discovered at Hagerman Fossil Beds Nationwide Monument in Idaho. (Courtesy of the Nationwide Park Service)

It left behind deposits of fine-grained sediments roughly 5,500 toes thick protecting a lot of southwest Idaho. These sediments embody spectacular fossil assemblages discovered within the Hagerman Fossil Beds Nationwide Monument, which embody horses, peccaries and otters. Round 2.5 million years in the past the lake overtopped a drainage divide close to present-day Huntington, Oregon, and was captured by the decrease Snake River. The lake drained to the north, carving Hells Canyon, the deepest river gorge in North America.

The origin and improvement of the Snake River Plain illustrates the various and far-reaching geologic impacts of the Yellowstone Hotspot. That “smile” that marks the topography throughout southern Idaho is greater than only a fairly face — er, geomorphic function. It has an incredible geologic story to inform as nicely!

Yellowstone Caldera Chronicles is a weekly column written by scientists and collaborators of the Yellowstone Volcano Observatory. 



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Idaho

Early morning house fire in Idaho Falls causes $30,000 in damage – East Idaho News

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Early morning house fire in Idaho Falls causes ,000 in damage – East Idaho News


The following is a news release from the Idaho Falls Fire Department.

IDAHO FALLS — The Idaho Falls Fire Department responded to a structure fire early Thanksgiving morning on the 700 block of Reed Avenue.

Around 12:43 a.m., a resident called 911 to report a fire involving a single-story home. The caller also reported that everyone had made it outside.

The Idaho Falls Fire Department responded immediately and arrived within five minutes. The first units on scene reported seeing smoke coming from the house. Firefighters discovered the blaze burning in the corner of the home and into the eves.

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The fire was quickly extinguished and firefighters worked to ensure the fire did not spread further into the home.

Both Idaho Falls Power and Intermountain Gas were called to secure utilities.

In total, seven people and a dog were displaced as a result of the fire. There were no injuries to firefighters and one civilian was evaluated on scene by paramedics, but was not taken to the hospital.

IFFD responded with three engines, two ambulances, a ladder truck and a battalion chief.

The cause of the fire remains under investigation by the Idaho Falls Fire Department Fire Prevention and Investigation Division. The total amount of damages is estimated at $30,000.

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IFFD also responded to another fire call Thursday morning around 4 a.m. It was reported that a resident in a home on Camrose Street awoke to the sound of a smoke alarm. They discovered another resident in the home had been smoking and sustained injuries when a fire ignited. The fire was out before IFFD arrived, but one adult was taken to Eastern Idaho Regional Medical Center.

With Thanksgiving underway, IFFD reminds residents to prioritize fire safety this holiday by staying vigilant in the kitchen and to cook safe. Nationwide, Thanksgiving is the peak day for home cooking fires, with more than three times the daily average for such incidents. For more Thanksgiving fire safety information, click here.

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After a failed execution, Creech’s appeal is decided by the Idaho Supreme Court

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After a failed execution, Creech’s appeal is decided by the Idaho Supreme Court


BOISE, Idaho (KMVT/KSVT) —Earlier this year, the State of Idaho attempted to execute Thomas Eugene Creech by lethal injection. For nearly an hour, the execution team attempted to establish a vein across various parts of his body, but each attempt resulted in vein collapse.

After many attempts, the procedure was halted, and Creech sought for post-conviction relief. He argued that proceeding with the lethal injection using a central line catheter after the execution attempt was stopped, it would constitute cruel and unusual punishment.

The district court dismissed the application because he failed to state a claim of constitutional violation. When Creech appealed, The Idaho Supreme Court held up to the district courts dismissal, as he failed to explain why the execution would be considered cruel and unusual punishment. It was also concluded that Creech could not bring a claim under the Eighth Amendment because he did not propose an alternative method of execution.

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Idaho Supreme Court rules on Thomas Creech’s last state appeal to avoid death penalty – East Idaho News

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Idaho Supreme Court rules on Thomas Creech’s last state appeal to avoid death penalty – East Idaho News


BOISE (Idaho Statesman) — Idaho’s high court dismissed a final state appeal from Thomas Creech on Wednesday, leaving the federal courts to decide whether Idaho can try again to execute its longest-serving death row prisoner after a failed attempt earlier this year.

The Idaho Supreme Court unanimously rejected Creech’s arguments that a second execution attempt would represent cruel and unusual punishment under the Eighth Amendment of the U.S. Constitution. In February, the execution team was unable after nearly an hour to find a vein in Creech’s body suitable for an IV to lethally inject him, and prison leaders called off the execution.

Creech became the first-ever prisoner to survive an execution in Idaho and just the sixth in U.S. history to survive one by lethal injection, according to the Washington, D.C.-based Death Penalty Information Center.

Creech alleged in his appeal that another lethal injection attempt, this time possibly with a stepped-up method known as a central line IV, which uses a catheter through a jugular in the neck, or vein in the upper thigh or chest, would violate his constitutional rights. A lower state court ruled against the claim last month.

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“The application does not support, with any likelihood, the conclusion that the pain other inmates purportedly suffered in other states establishes an ‘objectively intolerable’ risk of pain for Creech, as required under the Eighth Amendment,” Idaho Chief Justice G. Richard Bevan wrote for the court.

Idaho’s five justices also ruled against Creech in a similar appeal earlier this month.

The court’s ruling Wednesday sided with Idaho Attorney General Raúl Labrador’s office and was determined on legal briefs alone. No oral arguments were scheduled in the appeal.

Justice Colleen Zahn recused herself from Creech’s appeal and was replaced by Senior Justice Roger Burdick, who retired from the court in 2021. Zahn cited her decadelong tenure in the Attorney General’s Office before her appointment to the Supreme Court bench, state courts spokesperson Nate Poppino previously told the Idaho Statesman.

The State Appellate Public Defender’s Office, which represented Creech in the case, did not immediately respond to a request for comment from the Idaho Statesman. The Attorney General’s Office declined to comment Wednesday after the ruling.

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The Federal Defender Services of Idaho, which represents Creech in three other active appeals in federal court, did not immediately respond to a request for comment, including over its own federal appeal with the same legal arguments as the case just dismissed by the Idaho Supreme Court.

Creech was set to be executed earlier this month after he was served with a death warrant from Ada County Prosecuting Attorney Jan Bennetts’ office. A federal judge issued a stay and hit pause on the scheduled execution timeline before Idaho could follow through on the state’s first execution in more than a dozen years.

Creech, 74, has been incarcerated for 50 years on five murder convictions, including three victims in Idaho. His standing death sentence stems from the May 1981 beating death of fellow prisoner David D. Jensen, 23, for which Creech pleaded guilty. Before that, Creech was convicted of the November 1974 shooting deaths of two men in Valley County in Idaho, and later the shooting death of a man in Oregon and another man’s death by strangulation in California.

Arizona judge to decide federal appeals

Presiding over Creech’s three pending federal lawsuits is visiting U.S. District Judge G. Murray Snow from the District of Arizona. He stepped in after U.S. District Judge Amanda Brailsford for the District of Idaho was forced to recuse herself from one of Creech’s cases over her decadeslong friendship with Bennetts.

Snow, an appointee of former President George W. Bush, is no stranger to death penalty cases. He has handled several in Arizona, which, like Idaho, maintains capital punishment — though Arizona’s Democratic governor issued a pause on all executions last year.

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In a 2016 case, Snow ruled that witnesses to an execution must be allowed to see the entirety of the execution. That includes when a prisoner is brought into the execution chamber and strapped down to a gurney, as well as when chemicals are administered during a lethal injection.

Idaho’s prison system recently revamped its execution chamber to add an “execution preparation room” and cameras with closed-circuit live video and audio feeds to meet similar legal requirements for witnesses. The renovation, associated with possible use of a central line IV, cost the state $314,000.

In another Arizona case in 2017, Snow ruled that prison officials did not have to reveal their suppliers of lethal injection drugs or the credentials of anyone who participates in an execution. The identities of suppliers and members of the execution team are protected pieces of information under Arizona law.

Snow rationalized in his decision that some suppliers may not sell the drugs to the state if they were not granted anonymity, the Associated Press reported. Lethal injection drugs have in recent years become difficult to buy for corrections systems across the U.S., because of mounting public pressure and drug manufacturers prohibiting sales to prisons for use in executions.

Faced with its own challenges obtaining lethal injection drugs, Idaho approved a similar law in 2022 that shields any potential identifying information about drug suppliers, as well as the identities of execution participants, from public disclosure. The next year, Idaho prison officials paid $50,000 to acquire lethal injection drugs for the first time in several years, but withheld from where, citing the new law. The going retail price for the drugs is about $16,000, a doctor of pharmacy declared in court records.

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Thomas Creech, left, is Idaho’s longest-service death row prisoner, including after a failed execution by lethal injection in February 2024. He married his wife, LeAnn Creech, in 1998 while incarcerated. | Courtesy Federal Defender Services of Idaho

Idaho prison officials later bought a second round of lethal injection drugs for $100,000, but those expired, court records showed. That led to another $50,000 purchase, according to an invoice obtained by the Statesman through a public records request, in the weeks leading up to Creech’s scheduled execution.

Already, Snow has issued rulings in favor of Creech, including the stay of execution in one case. He also granted a doctor who specializes in assessing trauma the ability to evaluate Creech. Labrador’s office opposed the evaluation while Creech’s death warrant was active.

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