THEMIS: Terra Cimmeria crater gullies

Cimmeria crater gullies (THEMIS_IOTD_20190424)THEMIS Image of the Day, April 24, 2019. This VIS image shows part of the rim of an unnamed crater in Terra Cimmeria. A group of channels dissect the rim near to upper left of the image. These channels are called gullies due to being on a steep slope rather than a flat river plain.

With careful examination, it is possible to see a boundary layer between the upper incised gully and a lower deposition region. The boundary marks a change in slope, the steep upper portion supports fast moving fluid that carves into the rim eroding materials.

The change to a flatter slope causes the fluid to slow down and as it slows the materials carried by the fluid a deposited.

Explore more THEMIS Images of the Day by geological subject.

Posted in Reports | Tagged , , , , , , , , | Leave a comment

Curiosity update: A new drill hole!

2384MR0126580011002108E01_DXXXSols 2386-2387, April 22, 2019, update by MSL scientist Ken Herkenhoff: The drilling planned for last weekend was successful, so the top priority for Sol 2386 is to drop portions of the Kilmarie sample onto a closed SAM inlet cover and take Mastcam images after each dropoff to characterize the size of each portion. The results of this portioning test will be used to decide how many portions to eventually drop into SAM. After this testing is completed, Mastcam will measure the amount of dust in the atmosphere above MSL by imaging the Sun through neutral-density filters, and Navcam will search for clouds. Then the ChemCam RMI will acquire a “stack” of images of the Aberlady drill hole at various focus settings to find the best focus setting for future LIBS elemental chemistry measurements from our new vantage point. The RMI will also acquire a couple mosaics of the sulfate-rich rocks exposed… [More at link]

Posted in Reports | Tagged , , , , , , , , , , , , , , | Leave a comment

HiRISE: Side by side

ESP_054816_1560Side by side. The objective of this observation is to examine a small channel that has cut through a crater north of Hellas Planitia.

HiRISE Picture of the Day archive. [More at links]

Posted in Reports | Tagged , , , , , , , , , , | Leave a comment

InSight: First likely marsquake detected

NASA’s Mars InSight lander has measured and recorded for the first time ever a likely “marsquake.”

The faint seismic signal, detected by the lander’s Seismic Experiment for Interior Structure (SEIS) instrument, was recorded on April 6, the lander’s 128th Martian day, or sol. This is the first recorded trembling that appears to have come from inside the planet, as opposed to being caused by forces above the surface, such as wind. Scientists still are examining the data to determine the exact cause of the signal.

“InSight’s first readings carry on the science that began with NASA’s Apollo missions,” said InSight Principal Investigator Bruce Banerdt of NASA’s Jet Propulsion Laboratory (JPL) in Pasadena, California. “We’ve been collecting background noise up until now, but this first event officially kicks off a new field: Martian seismology!” [More at link]

Posted in Reports | Tagged , , , , , , , , , , , , , | Leave a comment

Curiosity: Kilmarie in color

2384MR0126580011002108E01_DXXXSol 2384, April 21, 2019. The Mastcam (100mm lens) took this image of the Kilmarie drill hole, which it appears may be shallower than Aberlady. Click the image to enlarge it.

Sol 2384 raw images (from all cameras).

Posted in Reports | Tagged , , , , , , , , , , , , | Leave a comment

THEMIS: Kaiser Crater dunes

Kaiser Crater dunes (THEMIS_IOTD_20190423)THEMIS Image of the Day, April 23, 2019. This VIS image shows large individual dunes on the floor of Kaiser Crater.

Small dark lines to the right of the sand dunes are the tracks made by dust devils as they move along the surface. Kaiser Crater is located in Noachis Terra.

Explore more THEMIS Images of the Day by geological subject.

Posted in Reports | Tagged , , , , , , , , , , , | Leave a comment

Curiosity: Kilmarie drilled

NLB_609132474EDR_F0751398NCAM00309M_Sol 2384, April 21, 2019. Successful drilling at Kilmarie puts two drill holes in the same Navcam frame. Aberlady is on the left, Kilmarie on the right on what may be a separate piece of bedrock. Click the image to enlarge it.

Sol 2384 raw images (from all cameras).

Posted in Reports | Tagged , , , , , , , , , , , , | Leave a comment

HiRISE: Quite smoooooth

ESP_054817_2245Quite smoooooth. Here in Deuteronilus Mensae, there is a smooth geologic unit overlying plains material. There are also slightly convex-up edges, polygonal patterns on the surface, and softened craters.

HiRISE Picture of the Day archive. [More at links]

Posted in Reports | Tagged , , , , , , , , , , , , | Leave a comment

THEMIS: Sand sheet, dunes in Matara Crater

Dunes in Matara Crater (THEMIS_IOTD_20190422)THEMIS Image of the Day, April 22, 2019. Today’s VIS image shows the floor of Matara Crater. A large sand sheet with surface dune forms dominates the floor of this crater located in Noachis Terra. The dunes’ dark tone indicates a lack of dust, which is light in tone. Thus the dune sands are probably active and moving under the wind.

Explore more THEMIS Images of the Day by geological subject.

Posted in Reports | Tagged , , , , , , , , , , | Leave a comment

Curiosity update: Drill all the rocks!

FRB_608954481EDR_F0751398FHAZ00208M_-br2Sols 2383-2385, April 19, 2019, update by MSL scientist Abigail Fraeman: Yestersol’s drill pre-load test was successful, so today we are go for a drill attempt at “Kilmarie”! The front hazcam image from yesterday’s test (shown above) is a helpful visual for understanding how close our new drill location will be to the last drill at “Aberlady.” In this image, you can see Curiosity resting the point of the drill on the future Kilmarie drill target along with the old Aberlady drill hole, a little to the left of the arm. It’s been a while since we’ve drilled two locations so close together! Avid readers of this blog will recall we decided to drill again in this area because we saw some irregularities during drilling Aberlady. Specifically, we weren’t sure we’d collected enough drill material for both CheMin and SAM analyses at the Aberlady location, so we’re hoping we can be more confident in the amount of sample we collect at Kilmarie… [More at link]

Posted in Reports | Tagged , , , , , , , , , , , , | Leave a comment