Spirit Has Blueberries, But No Mention Of Them
Here is a more detailed image study of the fossil evidence
Since this particular rock was scanned in full spectrum by NASA, I have the data needed to assemble full color (and even using the proper filters) images that show the spherules just as Opportunity's images do. Furthermore, since the left panoramic camera has two filters that overlap the right filters, I could construct a pair of stereo images from the same optical bands, and then make a stereo image of the results.
First, let's look at the true color image.
This image is constructed from the following three images from the NASA site. The red data is from filter L3 (673 nm) at this link. The green data is from filter L5 (535 nm) at this link. The blue data is from filter L6 (482 nm) at this link. Red data was left at 100% intensity, green data was set to 60% intensity, and blue data was set to 30% intensity. All images contribute 1/3 of the total luminance to the image, and the resulting image had its brightness and contrast equally set to +60%. The saturation was decreased 25% because otherwise the image looks "cartoonish".
The image is still too saturated, but this is to enhance the color of the "blueberries" so that they are easily picked out from the surrounding rock substrate. This is the exact same image set used to construct the stereo views on the previous page.
The most outstanding features are the two central rocks with blueberries on stems, and the stromatolites and blueberry rocks to the right. What does the stromatolite formation tell us? Take note of the fact that the fossilized organisms in the rocks to the right have stromatolites growing over them! This proves that the spherules were fossilized before the stromatolites grew, and that the stromatolites were therefore likely their contemporaries.
Some might argue that the stromatolite bed formed first and the silt and spherules fell into the bed later and fossilized on top of them. To me, it appears that the bedrock sediments full of spherules fractured due to an impact, exactly like those in Meridiani Planum. This produced the square, linear faces on the fractured blocks and the stromatolites grew into the spaces there. That would clearly explain how such perfect geometries and flat faces occurred.
Now, let's look at the red/blue images in stereo and see what we can.
Filter L2 is 753 nm, and filter R2 is 754 nm. We cannot humanly see this small difference; indeed, these are infrared light anyway and our eyes can only barely detect it at all. Only under strict darkness and very bright IR sources of short wavelength can some people detect it at all. Still, in most of the color images that NASA has produced, they have used L2 as the red channel, and for most purposes it is okay. It turns their blue reference chip to hot pink and reddens their images somewhat, but it is okay for casual observations.
Filter L1 is 436 nm, and filter L7 is 440 nm. We can use them interchangeably, and they represent the violet end of the visible spectrum. NASA has often used them for blue because, once again, for most purposes it will work well enough. As it happens, filter R1 is 440 nm, and so it can be paired with L1 or L7 and you can get a very nice stereo image. If only we have a good 535 nm filter on the right camera, we could construct very good color images in full stereo. As it is, we do not- all the remaining right filters are in the infrared bands, ranging from 803 to 1009 nm.
I have selected the red/blue pairs from the left and right cameras and constructed a "purple" image that is true stereo and very closely matched in the spectrum. To make it easier on the eyes, I have combined the red and blue data in each case and made a false "green" out of it. This means we get a false color image that still accurately shows the blueberries so they can stand out.
I then split the images into cross-eyed stereo pairs so we can see the details. Here are the results.
In the above image, the "blueberry stones" show stems and flat layers. I have positively identified these thin layers as carbonate minerals, based on the full infrared spectrum data from the raw images. This shows fossil spherules of carbonates and iron oxides (identical to Opportunity's findings) and also thin egg-shell-like layers that are characteristic of stromatolites.
The above image shows stromatolite fossils that have grown over spherule-loaded sediments. This puts the end to the "hematite concretion" theory because now, many unusual geological and geochemical processes had to have happened in exact sequence to produce first sediments, then concretions loaded with hematite, then odd layered rocks, then eroded the layers apart. It is truly unbelievable that such incredible circumstances would have come together to make such things happen in one place to the same rocks. Life is the simplest explanation because then, a single theory encompasses all the "oddities" at one stroke.
All the raw images used in these processes are here at the NASA site, and are the sub-frame EDR strip images at the bottom of the page. Each has the proper filter in its filename so you can individually pick out the ones you need when you try your hand at assembling these images yourself.